Merge commit 'afc8685395e775fe0f2a1698b683aea4afd124af'
[ffmpeg.git] / ffplay.c
1 /*
2  * Copyright (c) 2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * simple media player based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <inttypes.h>
28 #include <math.h>
29 #include <limits.h>
30 #include <signal.h>
31 #include "libavutil/avstring.h"
32 #include "libavutil/colorspace.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/imgutils.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/samplefmt.h"
39 #include "libavutil/avassert.h"
40 #include "libavutil/time.h"
41 #include "libavformat/avformat.h"
42 #include "libavdevice/avdevice.h"
43 #include "libswscale/swscale.h"
44 #include "libavutil/opt.h"
45 #include "libavcodec/avfft.h"
46 #include "libswresample/swresample.h"
47
48 #if CONFIG_AVFILTER
49 # include "libavfilter/avcodec.h"
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/buffersink.h"
52 # include "libavfilter/buffersrc.h"
53 #endif
54
55 #include <SDL.h>
56 #include <SDL_thread.h>
57
58 #include "cmdutils.h"
59
60 #include <assert.h>
61
62 const char program_name[] = "ffplay";
63 const int program_birth_year = 2003;
64
65 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
66 #define MIN_FRAMES 5
67
68 /* SDL audio buffer size, in samples. Should be small to have precise
69    A/V sync as SDL does not have hardware buffer fullness info. */
70 #define SDL_AUDIO_BUFFER_SIZE 1024
71
72 /* no AV sync correction is done if below the minimum AV sync threshold */
73 #define AV_SYNC_THRESHOLD_MIN 0.01
74 /* AV sync correction is done if above the maximum AV sync threshold */
75 #define AV_SYNC_THRESHOLD_MAX 0.1
76 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */
77 #define AV_SYNC_FRAMEDUP_THRESHOLD 0.1
78 /* no AV correction is done if too big error */
79 #define AV_NOSYNC_THRESHOLD 10.0
80
81 /* maximum audio speed change to get correct sync */
82 #define SAMPLE_CORRECTION_PERCENT_MAX 10
83
84 /* external clock speed adjustment constants for realtime sources based on buffer fullness */
85 #define EXTERNAL_CLOCK_SPEED_MIN  0.900
86 #define EXTERNAL_CLOCK_SPEED_MAX  1.010
87 #define EXTERNAL_CLOCK_SPEED_STEP 0.001
88
89 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
90 #define AUDIO_DIFF_AVG_NB   20
91
92 /* polls for possible required screen refresh at least this often, should be less than 1/fps */
93 #define REFRESH_RATE 0.01
94
95 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
96 /* TODO: We assume that a decoded and resampled frame fits into this buffer */
97 #define SAMPLE_ARRAY_SIZE (8 * 65536)
98
99 #define CURSOR_HIDE_DELAY 1000000
100
101 static int64_t sws_flags = SWS_BICUBIC;
102
103 typedef struct MyAVPacketList {
104     AVPacket pkt;
105     struct MyAVPacketList *next;
106     int serial;
107 } MyAVPacketList;
108
109 typedef struct PacketQueue {
110     MyAVPacketList *first_pkt, *last_pkt;
111     int nb_packets;
112     int size;
113     int abort_request;
114     int serial;
115     SDL_mutex *mutex;
116     SDL_cond *cond;
117 } PacketQueue;
118
119 #define VIDEO_PICTURE_QUEUE_SIZE 3
120 #define SUBPICTURE_QUEUE_SIZE 4
121
122 typedef struct VideoPicture {
123     double pts;             // presentation timestamp for this picture
124     int64_t pos;            // byte position in file
125     SDL_Overlay *bmp;
126     int width, height; /* source height & width */
127     int allocated;
128     int reallocate;
129     int serial;
130
131     AVRational sar;
132 } VideoPicture;
133
134 typedef struct SubPicture {
135     double pts; /* presentation time stamp for this picture */
136     AVSubtitle sub;
137 } SubPicture;
138
139 typedef struct AudioParams {
140     int freq;
141     int channels;
142     int64_t channel_layout;
143     enum AVSampleFormat fmt;
144 } AudioParams;
145
146 typedef struct Clock {
147     double pts;           /* clock base */
148     double pts_drift;     /* clock base minus time at which we updated the clock */
149     double last_updated;
150     double speed;
151     int serial;           /* clock is based on a packet with this serial */
152     int paused;
153     int *queue_serial;    /* pointer to the current packet queue serial, used for obsolete clock detection */
154 } Clock;
155
156 enum {
157     AV_SYNC_AUDIO_MASTER, /* default choice */
158     AV_SYNC_VIDEO_MASTER,
159     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
160 };
161
162 typedef struct VideoState {
163     SDL_Thread *read_tid;
164     SDL_Thread *video_tid;
165     AVInputFormat *iformat;
166     int no_background;
167     int abort_request;
168     int force_refresh;
169     int paused;
170     int last_paused;
171     int queue_attachments_req;
172     int seek_req;
173     int seek_flags;
174     int64_t seek_pos;
175     int64_t seek_rel;
176     int read_pause_return;
177     AVFormatContext *ic;
178     int realtime;
179
180     Clock audclk;
181     Clock vidclk;
182     Clock extclk;
183
184     int audio_stream;
185
186     int av_sync_type;
187
188     double audio_clock;
189     int audio_clock_serial;
190     double audio_diff_cum; /* used for AV difference average computation */
191     double audio_diff_avg_coef;
192     double audio_diff_threshold;
193     int audio_diff_avg_count;
194     AVStream *audio_st;
195     PacketQueue audioq;
196     int audio_hw_buf_size;
197     uint8_t silence_buf[SDL_AUDIO_BUFFER_SIZE];
198     uint8_t *audio_buf;
199     uint8_t *audio_buf1;
200     unsigned int audio_buf_size; /* in bytes */
201     unsigned int audio_buf1_size;
202     int audio_buf_index; /* in bytes */
203     int audio_write_buf_size;
204     int audio_buf_frames_pending;
205     AVPacket audio_pkt_temp;
206     AVPacket audio_pkt;
207     int audio_pkt_temp_serial;
208     int audio_last_serial;
209     struct AudioParams audio_src;
210 #if CONFIG_AVFILTER
211     struct AudioParams audio_filter_src;
212 #endif
213     struct AudioParams audio_tgt;
214     struct SwrContext *swr_ctx;
215     double audio_current_pts;
216     double audio_current_pts_drift;
217     int frame_drops_early;
218     int frame_drops_late;
219     AVFrame *frame;
220
221     enum ShowMode {
222         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
223     } show_mode;
224     int16_t sample_array[SAMPLE_ARRAY_SIZE];
225     int sample_array_index;
226     int last_i_start;
227     RDFTContext *rdft;
228     int rdft_bits;
229     FFTSample *rdft_data;
230     int xpos;
231     double last_vis_time;
232
233     SDL_Thread *subtitle_tid;
234     int subtitle_stream;
235     int subtitle_stream_changed;
236     AVStream *subtitle_st;
237     PacketQueue subtitleq;
238     SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
239     int subpq_size, subpq_rindex, subpq_windex;
240     SDL_mutex *subpq_mutex;
241     SDL_cond *subpq_cond;
242
243     double frame_timer;
244     double frame_last_pts;
245     double frame_last_duration;
246     double frame_last_dropped_pts;
247     double frame_last_returned_time;
248     double frame_last_filter_delay;
249     int64_t frame_last_dropped_pos;
250     int frame_last_dropped_serial;
251     int video_stream;
252     AVStream *video_st;
253     PacketQueue videoq;
254     double video_current_pts;       // current displayed pts
255     double video_current_pts_drift; // video_current_pts - time (av_gettime) at which we updated video_current_pts - used to have running video pts
256     int64_t video_current_pos;      // current displayed file pos
257     double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
258     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
259     int pictq_size, pictq_rindex, pictq_windex;
260     SDL_mutex *pictq_mutex;
261     SDL_cond *pictq_cond;
262 #if !CONFIG_AVFILTER
263     struct SwsContext *img_convert_ctx;
264 #endif
265     SDL_Rect last_display_rect;
266
267     char filename[1024];
268     int width, height, xleft, ytop;
269     int step;
270
271 #if CONFIG_AVFILTER
272     AVFilterContext *in_video_filter;   // the first filter in the video chain
273     AVFilterContext *out_video_filter;  // the last filter in the video chain
274     AVFilterContext *in_audio_filter;   // the first filter in the audio chain
275     AVFilterContext *out_audio_filter;  // the last filter in the audio chain
276     AVFilterGraph *agraph;              // audio filter graph
277 #endif
278
279     int last_video_stream, last_audio_stream, last_subtitle_stream;
280
281     SDL_cond *continue_read_thread;
282 } VideoState;
283
284 /* options specified by the user */
285 static AVInputFormat *file_iformat;
286 static const char *input_filename;
287 static const char *window_title;
288 static int fs_screen_width;
289 static int fs_screen_height;
290 static int default_width  = 640;
291 static int default_height = 480;
292 static int screen_width  = 0;
293 static int screen_height = 0;
294 static int audio_disable;
295 static int video_disable;
296 static int subtitle_disable;
297 static int wanted_stream[AVMEDIA_TYPE_NB] = {
298     [AVMEDIA_TYPE_AUDIO]    = -1,
299     [AVMEDIA_TYPE_VIDEO]    = -1,
300     [AVMEDIA_TYPE_SUBTITLE] = -1,
301 };
302 static int seek_by_bytes = -1;
303 static int display_disable;
304 static int show_status = 1;
305 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
306 static int64_t start_time = AV_NOPTS_VALUE;
307 static int64_t duration = AV_NOPTS_VALUE;
308 static int workaround_bugs = 1;
309 static int fast = 0;
310 static int genpts = 0;
311 static int lowres = 0;
312 static int idct = FF_IDCT_AUTO;
313 static int error_concealment = 3;
314 static int decoder_reorder_pts = -1;
315 static int autoexit;
316 static int exit_on_keydown;
317 static int exit_on_mousedown;
318 static int loop = 1;
319 static int framedrop = -1;
320 static int infinite_buffer = -1;
321 static enum ShowMode show_mode = SHOW_MODE_NONE;
322 static const char *audio_codec_name;
323 static const char *subtitle_codec_name;
324 static const char *video_codec_name;
325 double rdftspeed = 0.02;
326 static int64_t cursor_last_shown;
327 static int cursor_hidden = 0;
328 #if CONFIG_AVFILTER
329 static char *vfilters = NULL;
330 static char *afilters = NULL;
331 #endif
332
333 /* current context */
334 static int is_full_screen;
335 static int64_t audio_callback_time;
336
337 static AVPacket flush_pkt;
338
339 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
340 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
341
342 static SDL_Surface *screen;
343
344 static inline
345 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
346                    enum AVSampleFormat fmt2, int64_t channel_count2)
347 {
348     /* If channel count == 1, planar and non-planar formats are the same */
349     if (channel_count1 == 1 && channel_count2 == 1)
350         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
351     else
352         return channel_count1 != channel_count2 || fmt1 != fmt2;
353 }
354
355 static inline
356 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
357 {
358     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
359         return channel_layout;
360     else
361         return 0;
362 }
363
364 static int packet_queue_put(PacketQueue *q, AVPacket *pkt);
365
366 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
367 {
368     MyAVPacketList *pkt1;
369
370     if (q->abort_request)
371        return -1;
372
373     pkt1 = av_malloc(sizeof(MyAVPacketList));
374     if (!pkt1)
375         return -1;
376     pkt1->pkt = *pkt;
377     pkt1->next = NULL;
378     if (pkt == &flush_pkt)
379         q->serial++;
380     pkt1->serial = q->serial;
381
382     if (!q->last_pkt)
383         q->first_pkt = pkt1;
384     else
385         q->last_pkt->next = pkt1;
386     q->last_pkt = pkt1;
387     q->nb_packets++;
388     q->size += pkt1->pkt.size + sizeof(*pkt1);
389     /* XXX: should duplicate packet data in DV case */
390     SDL_CondSignal(q->cond);
391     return 0;
392 }
393
394 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
395 {
396     int ret;
397
398     /* duplicate the packet */
399     if (pkt != &flush_pkt && av_dup_packet(pkt) < 0)
400         return -1;
401
402     SDL_LockMutex(q->mutex);
403     ret = packet_queue_put_private(q, pkt);
404     SDL_UnlockMutex(q->mutex);
405
406     if (pkt != &flush_pkt && ret < 0)
407         av_free_packet(pkt);
408
409     return ret;
410 }
411
412 /* packet queue handling */
413 static void packet_queue_init(PacketQueue *q)
414 {
415     memset(q, 0, sizeof(PacketQueue));
416     q->mutex = SDL_CreateMutex();
417     q->cond = SDL_CreateCond();
418     q->abort_request = 1;
419 }
420
421 static void packet_queue_flush(PacketQueue *q)
422 {
423     MyAVPacketList *pkt, *pkt1;
424
425     SDL_LockMutex(q->mutex);
426     for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
427         pkt1 = pkt->next;
428         av_free_packet(&pkt->pkt);
429         av_freep(&pkt);
430     }
431     q->last_pkt = NULL;
432     q->first_pkt = NULL;
433     q->nb_packets = 0;
434     q->size = 0;
435     SDL_UnlockMutex(q->mutex);
436 }
437
438 static void packet_queue_destroy(PacketQueue *q)
439 {
440     packet_queue_flush(q);
441     SDL_DestroyMutex(q->mutex);
442     SDL_DestroyCond(q->cond);
443 }
444
445 static void packet_queue_abort(PacketQueue *q)
446 {
447     SDL_LockMutex(q->mutex);
448
449     q->abort_request = 1;
450
451     SDL_CondSignal(q->cond);
452
453     SDL_UnlockMutex(q->mutex);
454 }
455
456 static void packet_queue_start(PacketQueue *q)
457 {
458     SDL_LockMutex(q->mutex);
459     q->abort_request = 0;
460     packet_queue_put_private(q, &flush_pkt);
461     SDL_UnlockMutex(q->mutex);
462 }
463
464 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
465 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
466 {
467     MyAVPacketList *pkt1;
468     int ret;
469
470     SDL_LockMutex(q->mutex);
471
472     for (;;) {
473         if (q->abort_request) {
474             ret = -1;
475             break;
476         }
477
478         pkt1 = q->first_pkt;
479         if (pkt1) {
480             q->first_pkt = pkt1->next;
481             if (!q->first_pkt)
482                 q->last_pkt = NULL;
483             q->nb_packets--;
484             q->size -= pkt1->pkt.size + sizeof(*pkt1);
485             *pkt = pkt1->pkt;
486             if (serial)
487                 *serial = pkt1->serial;
488             av_free(pkt1);
489             ret = 1;
490             break;
491         } else if (!block) {
492             ret = 0;
493             break;
494         } else {
495             SDL_CondWait(q->cond, q->mutex);
496         }
497     }
498     SDL_UnlockMutex(q->mutex);
499     return ret;
500 }
501
502 static inline void fill_rectangle(SDL_Surface *screen,
503                                   int x, int y, int w, int h, int color, int update)
504 {
505     SDL_Rect rect;
506     rect.x = x;
507     rect.y = y;
508     rect.w = w;
509     rect.h = h;
510     SDL_FillRect(screen, &rect, color);
511     if (update && w > 0 && h > 0)
512         SDL_UpdateRect(screen, x, y, w, h);
513 }
514
515 /* draw only the border of a rectangle */
516 static void fill_border(int xleft, int ytop, int width, int height, int x, int y, int w, int h, int color, int update)
517 {
518     int w1, w2, h1, h2;
519
520     /* fill the background */
521     w1 = x;
522     if (w1 < 0)
523         w1 = 0;
524     w2 = width - (x + w);
525     if (w2 < 0)
526         w2 = 0;
527     h1 = y;
528     if (h1 < 0)
529         h1 = 0;
530     h2 = height - (y + h);
531     if (h2 < 0)
532         h2 = 0;
533     fill_rectangle(screen,
534                    xleft, ytop,
535                    w1, height,
536                    color, update);
537     fill_rectangle(screen,
538                    xleft + width - w2, ytop,
539                    w2, height,
540                    color, update);
541     fill_rectangle(screen,
542                    xleft + w1, ytop,
543                    width - w1 - w2, h1,
544                    color, update);
545     fill_rectangle(screen,
546                    xleft + w1, ytop + height - h2,
547                    width - w1 - w2, h2,
548                    color, update);
549 }
550
551 #define ALPHA_BLEND(a, oldp, newp, s)\
552 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
553
554 #define RGBA_IN(r, g, b, a, s)\
555 {\
556     unsigned int v = ((const uint32_t *)(s))[0];\
557     a = (v >> 24) & 0xff;\
558     r = (v >> 16) & 0xff;\
559     g = (v >> 8) & 0xff;\
560     b = v & 0xff;\
561 }
562
563 #define YUVA_IN(y, u, v, a, s, pal)\
564 {\
565     unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
566     a = (val >> 24) & 0xff;\
567     y = (val >> 16) & 0xff;\
568     u = (val >> 8) & 0xff;\
569     v = val & 0xff;\
570 }
571
572 #define YUVA_OUT(d, y, u, v, a)\
573 {\
574     ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
575 }
576
577
578 #define BPP 1
579
580 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
581 {
582     int wrap, wrap3, width2, skip2;
583     int y, u, v, a, u1, v1, a1, w, h;
584     uint8_t *lum, *cb, *cr;
585     const uint8_t *p;
586     const uint32_t *pal;
587     int dstx, dsty, dstw, dsth;
588
589     dstw = av_clip(rect->w, 0, imgw);
590     dsth = av_clip(rect->h, 0, imgh);
591     dstx = av_clip(rect->x, 0, imgw - dstw);
592     dsty = av_clip(rect->y, 0, imgh - dsth);
593     lum = dst->data[0] + dsty * dst->linesize[0];
594     cb  = dst->data[1] + (dsty >> 1) * dst->linesize[1];
595     cr  = dst->data[2] + (dsty >> 1) * dst->linesize[2];
596
597     width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
598     skip2 = dstx >> 1;
599     wrap = dst->linesize[0];
600     wrap3 = rect->pict.linesize[0];
601     p = rect->pict.data[0];
602     pal = (const uint32_t *)rect->pict.data[1];  /* Now in YCrCb! */
603
604     if (dsty & 1) {
605         lum += dstx;
606         cb += skip2;
607         cr += skip2;
608
609         if (dstx & 1) {
610             YUVA_IN(y, u, v, a, p, pal);
611             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
612             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
613             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
614             cb++;
615             cr++;
616             lum++;
617             p += BPP;
618         }
619         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
620             YUVA_IN(y, u, v, a, p, pal);
621             u1 = u;
622             v1 = v;
623             a1 = a;
624             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
625
626             YUVA_IN(y, u, v, a, p + BPP, pal);
627             u1 += u;
628             v1 += v;
629             a1 += a;
630             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
631             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
632             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
633             cb++;
634             cr++;
635             p += 2 * BPP;
636             lum += 2;
637         }
638         if (w) {
639             YUVA_IN(y, u, v, a, p, pal);
640             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
641             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
642             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
643             p++;
644             lum++;
645         }
646         p += wrap3 - dstw * BPP;
647         lum += wrap - dstw - dstx;
648         cb += dst->linesize[1] - width2 - skip2;
649         cr += dst->linesize[2] - width2 - skip2;
650     }
651     for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
652         lum += dstx;
653         cb += skip2;
654         cr += skip2;
655
656         if (dstx & 1) {
657             YUVA_IN(y, u, v, a, p, pal);
658             u1 = u;
659             v1 = v;
660             a1 = a;
661             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
662             p += wrap3;
663             lum += wrap;
664             YUVA_IN(y, u, v, a, p, pal);
665             u1 += u;
666             v1 += v;
667             a1 += a;
668             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
669             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
670             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
671             cb++;
672             cr++;
673             p += -wrap3 + BPP;
674             lum += -wrap + 1;
675         }
676         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
677             YUVA_IN(y, u, v, a, p, pal);
678             u1 = u;
679             v1 = v;
680             a1 = a;
681             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
682
683             YUVA_IN(y, u, v, a, p + BPP, pal);
684             u1 += u;
685             v1 += v;
686             a1 += a;
687             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
688             p += wrap3;
689             lum += wrap;
690
691             YUVA_IN(y, u, v, a, p, pal);
692             u1 += u;
693             v1 += v;
694             a1 += a;
695             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
696
697             YUVA_IN(y, u, v, a, p + BPP, pal);
698             u1 += u;
699             v1 += v;
700             a1 += a;
701             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
702
703             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
704             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
705
706             cb++;
707             cr++;
708             p += -wrap3 + 2 * BPP;
709             lum += -wrap + 2;
710         }
711         if (w) {
712             YUVA_IN(y, u, v, a, p, pal);
713             u1 = u;
714             v1 = v;
715             a1 = a;
716             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
717             p += wrap3;
718             lum += wrap;
719             YUVA_IN(y, u, v, a, p, pal);
720             u1 += u;
721             v1 += v;
722             a1 += a;
723             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
724             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
725             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
726             cb++;
727             cr++;
728             p += -wrap3 + BPP;
729             lum += -wrap + 1;
730         }
731         p += wrap3 + (wrap3 - dstw * BPP);
732         lum += wrap + (wrap - dstw - dstx);
733         cb += dst->linesize[1] - width2 - skip2;
734         cr += dst->linesize[2] - width2 - skip2;
735     }
736     /* handle odd height */
737     if (h) {
738         lum += dstx;
739         cb += skip2;
740         cr += skip2;
741
742         if (dstx & 1) {
743             YUVA_IN(y, u, v, a, p, pal);
744             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
745             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
746             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
747             cb++;
748             cr++;
749             lum++;
750             p += BPP;
751         }
752         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
753             YUVA_IN(y, u, v, a, p, pal);
754             u1 = u;
755             v1 = v;
756             a1 = a;
757             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
758
759             YUVA_IN(y, u, v, a, p + BPP, pal);
760             u1 += u;
761             v1 += v;
762             a1 += a;
763             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
764             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
765             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
766             cb++;
767             cr++;
768             p += 2 * BPP;
769             lum += 2;
770         }
771         if (w) {
772             YUVA_IN(y, u, v, a, p, pal);
773             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
774             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
775             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
776         }
777     }
778 }
779
780 static void free_subpicture(SubPicture *sp)
781 {
782     avsubtitle_free(&sp->sub);
783 }
784
785 static void calculate_display_rect(SDL_Rect *rect, int scr_xleft, int scr_ytop, int scr_width, int scr_height, VideoPicture *vp)
786 {
787     float aspect_ratio;
788     int width, height, x, y;
789
790     if (vp->sar.num == 0)
791         aspect_ratio = 0;
792     else
793         aspect_ratio = av_q2d(vp->sar);
794
795     if (aspect_ratio <= 0.0)
796         aspect_ratio = 1.0;
797     aspect_ratio *= (float)vp->width / (float)vp->height;
798
799     /* XXX: we suppose the screen has a 1.0 pixel ratio */
800     height = scr_height;
801     width = ((int)rint(height * aspect_ratio)) & ~1;
802     if (width > scr_width) {
803         width = scr_width;
804         height = ((int)rint(width / aspect_ratio)) & ~1;
805     }
806     x = (scr_width - width) / 2;
807     y = (scr_height - height) / 2;
808     rect->x = scr_xleft + x;
809     rect->y = scr_ytop  + y;
810     rect->w = FFMAX(width,  1);
811     rect->h = FFMAX(height, 1);
812 }
813
814 static void video_image_display(VideoState *is)
815 {
816     VideoPicture *vp;
817     SubPicture *sp;
818     AVPicture pict;
819     SDL_Rect rect;
820     int i;
821
822     vp = &is->pictq[is->pictq_rindex];
823     if (vp->bmp) {
824         if (is->subtitle_st) {
825             if (is->subpq_size > 0) {
826                 sp = &is->subpq[is->subpq_rindex];
827
828                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
829                     SDL_LockYUVOverlay (vp->bmp);
830
831                     pict.data[0] = vp->bmp->pixels[0];
832                     pict.data[1] = vp->bmp->pixels[2];
833                     pict.data[2] = vp->bmp->pixels[1];
834
835                     pict.linesize[0] = vp->bmp->pitches[0];
836                     pict.linesize[1] = vp->bmp->pitches[2];
837                     pict.linesize[2] = vp->bmp->pitches[1];
838
839                     for (i = 0; i < sp->sub.num_rects; i++)
840                         blend_subrect(&pict, sp->sub.rects[i],
841                                       vp->bmp->w, vp->bmp->h);
842
843                     SDL_UnlockYUVOverlay (vp->bmp);
844                 }
845             }
846         }
847
848         calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp);
849
850         SDL_DisplayYUVOverlay(vp->bmp, &rect);
851
852         if (rect.x != is->last_display_rect.x || rect.y != is->last_display_rect.y || rect.w != is->last_display_rect.w || rect.h != is->last_display_rect.h || is->force_refresh) {
853             int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
854             fill_border(is->xleft, is->ytop, is->width, is->height, rect.x, rect.y, rect.w, rect.h, bgcolor, 1);
855             is->last_display_rect = rect;
856         }
857     }
858 }
859
860 static inline int compute_mod(int a, int b)
861 {
862     return a < 0 ? a%b + b : a%b;
863 }
864
865 static void video_audio_display(VideoState *s)
866 {
867     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
868     int ch, channels, h, h2, bgcolor, fgcolor;
869     int64_t time_diff;
870     int rdft_bits, nb_freq;
871
872     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
873         ;
874     nb_freq = 1 << (rdft_bits - 1);
875
876     /* compute display index : center on currently output samples */
877     channels = s->audio_tgt.channels;
878     nb_display_channels = channels;
879     if (!s->paused) {
880         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
881         n = 2 * channels;
882         delay = s->audio_write_buf_size;
883         delay /= n;
884
885         /* to be more precise, we take into account the time spent since
886            the last buffer computation */
887         if (audio_callback_time) {
888             time_diff = av_gettime() - audio_callback_time;
889             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
890         }
891
892         delay += 2 * data_used;
893         if (delay < data_used)
894             delay = data_used;
895
896         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
897         if (s->show_mode == SHOW_MODE_WAVES) {
898             h = INT_MIN;
899             for (i = 0; i < 1000; i += channels) {
900                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
901                 int a = s->sample_array[idx];
902                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
903                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
904                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
905                 int score = a - d;
906                 if (h < score && (b ^ c) < 0) {
907                     h = score;
908                     i_start = idx;
909                 }
910             }
911         }
912
913         s->last_i_start = i_start;
914     } else {
915         i_start = s->last_i_start;
916     }
917
918     bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
919     if (s->show_mode == SHOW_MODE_WAVES) {
920         fill_rectangle(screen,
921                        s->xleft, s->ytop, s->width, s->height,
922                        bgcolor, 0);
923
924         fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
925
926         /* total height for one channel */
927         h = s->height / nb_display_channels;
928         /* graph height / 2 */
929         h2 = (h * 9) / 20;
930         for (ch = 0; ch < nb_display_channels; ch++) {
931             i = i_start + ch;
932             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
933             for (x = 0; x < s->width; x++) {
934                 y = (s->sample_array[i] * h2) >> 15;
935                 if (y < 0) {
936                     y = -y;
937                     ys = y1 - y;
938                 } else {
939                     ys = y1;
940                 }
941                 fill_rectangle(screen,
942                                s->xleft + x, ys, 1, y,
943                                fgcolor, 0);
944                 i += channels;
945                 if (i >= SAMPLE_ARRAY_SIZE)
946                     i -= SAMPLE_ARRAY_SIZE;
947             }
948         }
949
950         fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
951
952         for (ch = 1; ch < nb_display_channels; ch++) {
953             y = s->ytop + ch * h;
954             fill_rectangle(screen,
955                            s->xleft, y, s->width, 1,
956                            fgcolor, 0);
957         }
958         SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
959     } else {
960         nb_display_channels= FFMIN(nb_display_channels, 2);
961         if (rdft_bits != s->rdft_bits) {
962             av_rdft_end(s->rdft);
963             av_free(s->rdft_data);
964             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
965             s->rdft_bits = rdft_bits;
966             s->rdft_data = av_malloc(4 * nb_freq * sizeof(*s->rdft_data));
967         }
968         {
969             FFTSample *data[2];
970             for (ch = 0; ch < nb_display_channels; ch++) {
971                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
972                 i = i_start + ch;
973                 for (x = 0; x < 2 * nb_freq; x++) {
974                     double w = (x-nb_freq) * (1.0 / nb_freq);
975                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
976                     i += channels;
977                     if (i >= SAMPLE_ARRAY_SIZE)
978                         i -= SAMPLE_ARRAY_SIZE;
979                 }
980                 av_rdft_calc(s->rdft, data[ch]);
981             }
982             // least efficient way to do this, we should of course directly access it but its more than fast enough
983             for (y = 0; y < s->height; y++) {
984                 double w = 1 / sqrt(nb_freq);
985                 int a = sqrt(w * sqrt(data[0][2 * y + 0] * data[0][2 * y + 0] + data[0][2 * y + 1] * data[0][2 * y + 1]));
986                 int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
987                        + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
988                 a = FFMIN(a, 255);
989                 b = FFMIN(b, 255);
990                 fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);
991
992                 fill_rectangle(screen,
993                             s->xpos, s->height-y, 1, 1,
994                             fgcolor, 0);
995             }
996         }
997         SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
998         if (!s->paused)
999             s->xpos++;
1000         if (s->xpos >= s->width)
1001             s->xpos= s->xleft;
1002     }
1003 }
1004
1005 static void stream_close(VideoState *is)
1006 {
1007     VideoPicture *vp;
1008     int i;
1009     /* XXX: use a special url_shutdown call to abort parse cleanly */
1010     is->abort_request = 1;
1011     SDL_WaitThread(is->read_tid, NULL);
1012     packet_queue_destroy(&is->videoq);
1013     packet_queue_destroy(&is->audioq);
1014     packet_queue_destroy(&is->subtitleq);
1015
1016     /* free all pictures */
1017     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
1018         vp = &is->pictq[i];
1019         if (vp->bmp) {
1020             SDL_FreeYUVOverlay(vp->bmp);
1021             vp->bmp = NULL;
1022         }
1023     }
1024     SDL_DestroyMutex(is->pictq_mutex);
1025     SDL_DestroyCond(is->pictq_cond);
1026     SDL_DestroyMutex(is->subpq_mutex);
1027     SDL_DestroyCond(is->subpq_cond);
1028     SDL_DestroyCond(is->continue_read_thread);
1029 #if !CONFIG_AVFILTER
1030     sws_freeContext(is->img_convert_ctx);
1031 #endif
1032     av_free(is);
1033 }
1034
1035 static void do_exit(VideoState *is)
1036 {
1037     if (is) {
1038         stream_close(is);
1039     }
1040     av_lockmgr_register(NULL);
1041     uninit_opts();
1042 #if CONFIG_AVFILTER
1043     av_freep(&vfilters);
1044 #endif
1045     avformat_network_deinit();
1046     if (show_status)
1047         printf("\n");
1048     SDL_Quit();
1049     av_log(NULL, AV_LOG_QUIET, "%s", "");
1050     exit(0);
1051 }
1052
1053 static void sigterm_handler(int sig)
1054 {
1055     exit(123);
1056 }
1057
1058 static int video_open(VideoState *is, int force_set_video_mode, VideoPicture *vp)
1059 {
1060     int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
1061     int w,h;
1062     SDL_Rect rect;
1063
1064     if (is_full_screen) flags |= SDL_FULLSCREEN;
1065     else                flags |= SDL_RESIZABLE;
1066
1067     if (vp && vp->width) {
1068         calculate_display_rect(&rect, 0, 0, INT_MAX, vp->height, vp);
1069         default_width  = rect.w;
1070         default_height = rect.h;
1071     }
1072
1073     if (is_full_screen && fs_screen_width) {
1074         w = fs_screen_width;
1075         h = fs_screen_height;
1076     } else if (!is_full_screen && screen_width) {
1077         w = screen_width;
1078         h = screen_height;
1079     } else {
1080         w = default_width;
1081         h = default_height;
1082     }
1083     w = FFMIN(16383, w);
1084     if (screen && is->width == screen->w && screen->w == w
1085        && is->height== screen->h && screen->h == h && !force_set_video_mode)
1086         return 0;
1087     screen = SDL_SetVideoMode(w, h, 0, flags);
1088     if (!screen) {
1089         av_log(NULL, AV_LOG_FATAL, "SDL: could not set video mode - exiting\n");
1090         do_exit(is);
1091     }
1092     if (!window_title)
1093         window_title = input_filename;
1094     SDL_WM_SetCaption(window_title, window_title);
1095
1096     is->width  = screen->w;
1097     is->height = screen->h;
1098
1099     return 0;
1100 }
1101
1102 /* display the current picture, if any */
1103 static void video_display(VideoState *is)
1104 {
1105     if (!screen)
1106         video_open(is, 0, NULL);
1107     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1108         video_audio_display(is);
1109     else if (is->video_st)
1110         video_image_display(is);
1111 }
1112
1113 static double get_clock(Clock *c)
1114 {
1115     if (*c->queue_serial != c->serial)
1116         return NAN;
1117     if (c->paused) {
1118         return c->pts;
1119     } else {
1120         double time = av_gettime() / 1000000.0;
1121         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1122     }
1123 }
1124
1125 static void set_clock_at(Clock *c, double pts, int serial, double time)
1126 {
1127     c->pts = pts;
1128     c->last_updated = time;
1129     c->pts_drift = c->pts - time;
1130     c->serial = serial;
1131 }
1132
1133 static void set_clock(Clock *c, double pts, int serial)
1134 {
1135     double time = av_gettime() / 1000000.0;
1136     set_clock_at(c, pts, serial, time);
1137 }
1138
1139 static void set_clock_speed(Clock *c, double speed)
1140 {
1141     set_clock(c, get_clock(c), c->serial);
1142     c->speed = speed;
1143 }
1144
1145 static void init_clock(Clock *c, int *queue_serial)
1146 {
1147     c->speed = 1.0;
1148     c->paused = 0;
1149     c->queue_serial = queue_serial;
1150     set_clock(c, NAN, -1);
1151 }
1152
1153 static void sync_clock_to_slave(Clock *c, Clock *slave)
1154 {
1155     double clock = get_clock(c);
1156     double slave_clock = get_clock(slave);
1157     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1158         set_clock(c, slave_clock, slave->serial);
1159 }
1160
1161 static int get_master_sync_type(VideoState *is) {
1162     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1163         if (is->video_st)
1164             return AV_SYNC_VIDEO_MASTER;
1165         else
1166             return AV_SYNC_AUDIO_MASTER;
1167     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1168         if (is->audio_st)
1169             return AV_SYNC_AUDIO_MASTER;
1170         else
1171             return AV_SYNC_EXTERNAL_CLOCK;
1172     } else {
1173         return AV_SYNC_EXTERNAL_CLOCK;
1174     }
1175 }
1176
1177 /* get the current master clock value */
1178 static double get_master_clock(VideoState *is)
1179 {
1180     double val;
1181
1182     switch (get_master_sync_type(is)) {
1183         case AV_SYNC_VIDEO_MASTER:
1184             val = get_clock(&is->vidclk);
1185             break;
1186         case AV_SYNC_AUDIO_MASTER:
1187             val = get_clock(&is->audclk);
1188             break;
1189         default:
1190             val = get_clock(&is->extclk);
1191             break;
1192     }
1193     return val;
1194 }
1195
1196 static void check_external_clock_speed(VideoState *is) {
1197    if (is->video_stream >= 0 && is->videoq.nb_packets <= MIN_FRAMES / 2 ||
1198        is->audio_stream >= 0 && is->audioq.nb_packets <= MIN_FRAMES / 2) {
1199        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1200    } else if ((is->video_stream < 0 || is->videoq.nb_packets > MIN_FRAMES * 2) &&
1201               (is->audio_stream < 0 || is->audioq.nb_packets > MIN_FRAMES * 2)) {
1202        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1203    } else {
1204        double speed = is->extclk.speed;
1205        if (speed != 1.0)
1206            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1207    }
1208 }
1209
1210 /* seek in the stream */
1211 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1212 {
1213     if (!is->seek_req) {
1214         is->seek_pos = pos;
1215         is->seek_rel = rel;
1216         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1217         if (seek_by_bytes)
1218             is->seek_flags |= AVSEEK_FLAG_BYTE;
1219         is->seek_req = 1;
1220         SDL_CondSignal(is->continue_read_thread);
1221     }
1222 }
1223
1224 /* pause or resume the video */
1225 static void stream_toggle_pause(VideoState *is)
1226 {
1227     if (is->paused) {
1228         is->frame_timer += av_gettime() / 1000000.0 + is->vidclk.pts_drift - is->vidclk.pts;
1229         if (is->read_pause_return != AVERROR(ENOSYS)) {
1230             is->vidclk.paused = 0;
1231         }
1232         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1233     }
1234     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1235     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1236 }
1237
1238 static void toggle_pause(VideoState *is)
1239 {
1240     stream_toggle_pause(is);
1241     is->step = 0;
1242 }
1243
1244 static void step_to_next_frame(VideoState *is)
1245 {
1246     /* if the stream is paused unpause it, then step */
1247     if (is->paused)
1248         stream_toggle_pause(is);
1249     is->step = 1;
1250 }
1251
1252 static double compute_target_delay(double delay, VideoState *is)
1253 {
1254     double sync_threshold, diff;
1255
1256     /* update delay to follow master synchronisation source */
1257     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1258         /* if video is slave, we try to correct big delays by
1259            duplicating or deleting a frame */
1260         diff = get_clock(&is->vidclk) - get_master_clock(is);
1261
1262         /* skip or repeat frame. We take into account the
1263            delay to compute the threshold. I still don't know
1264            if it is the best guess */
1265         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1266         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1267             if (diff <= -sync_threshold)
1268                 delay = FFMAX(0, delay + diff);
1269             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1270                 delay = delay + diff;
1271             else if (diff >= sync_threshold)
1272                 delay = 2 * delay;
1273         }
1274     }
1275
1276     av_dlog(NULL, "video: delay=%0.3f A-V=%f\n",
1277             delay, -diff);
1278
1279     return delay;
1280 }
1281
1282 static void pictq_next_picture(VideoState *is) {
1283     /* update queue size and signal for next picture */
1284     if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1285         is->pictq_rindex = 0;
1286
1287     SDL_LockMutex(is->pictq_mutex);
1288     is->pictq_size--;
1289     SDL_CondSignal(is->pictq_cond);
1290     SDL_UnlockMutex(is->pictq_mutex);
1291 }
1292
1293 static int pictq_prev_picture(VideoState *is) {
1294     VideoPicture *prevvp;
1295     int ret = 0;
1296     /* update queue size and signal for the previous picture */
1297     prevvp = &is->pictq[(is->pictq_rindex + VIDEO_PICTURE_QUEUE_SIZE - 1) % VIDEO_PICTURE_QUEUE_SIZE];
1298     if (prevvp->allocated && prevvp->serial == is->videoq.serial) {
1299         SDL_LockMutex(is->pictq_mutex);
1300         if (is->pictq_size < VIDEO_PICTURE_QUEUE_SIZE) {
1301             if (--is->pictq_rindex == -1)
1302                 is->pictq_rindex = VIDEO_PICTURE_QUEUE_SIZE - 1;
1303             is->pictq_size++;
1304             ret = 1;
1305         }
1306         SDL_CondSignal(is->pictq_cond);
1307         SDL_UnlockMutex(is->pictq_mutex);
1308     }
1309     return ret;
1310 }
1311
1312 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1313     /* update current video pts */
1314     set_clock(&is->vidclk, pts, serial);
1315     sync_clock_to_slave(&is->extclk, &is->vidclk);
1316     is->video_current_pos = pos;
1317     is->frame_last_pts = pts;
1318 }
1319
1320 /* called to display each frame */
1321 static void video_refresh(void *opaque, double *remaining_time)
1322 {
1323     VideoState *is = opaque;
1324     VideoPicture *vp;
1325     double time;
1326
1327     SubPicture *sp, *sp2;
1328
1329     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1330         check_external_clock_speed(is);
1331
1332     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1333         time = av_gettime() / 1000000.0;
1334         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1335             video_display(is);
1336             is->last_vis_time = time;
1337         }
1338         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1339     }
1340
1341     if (is->video_st) {
1342         int redisplay = 0;
1343         if (is->force_refresh)
1344             redisplay = pictq_prev_picture(is);
1345 retry:
1346         if (is->pictq_size == 0) {
1347             SDL_LockMutex(is->pictq_mutex);
1348             if (is->frame_last_dropped_pts != AV_NOPTS_VALUE && is->frame_last_dropped_pts > is->frame_last_pts) {
1349                 update_video_pts(is, is->frame_last_dropped_pts, is->frame_last_dropped_pos, is->frame_last_dropped_serial);
1350                 is->frame_last_dropped_pts = AV_NOPTS_VALUE;
1351             }
1352             SDL_UnlockMutex(is->pictq_mutex);
1353             // nothing to do, no picture to display in the queue
1354         } else {
1355             double last_duration, duration, delay;
1356             /* dequeue the picture */
1357             vp = &is->pictq[is->pictq_rindex];
1358
1359             if (vp->serial != is->videoq.serial) {
1360                 pictq_next_picture(is);
1361                 redisplay = 0;
1362                 goto retry;
1363             }
1364
1365             if (is->paused)
1366                 goto display;
1367
1368             /* compute nominal last_duration */
1369             last_duration = vp->pts - is->frame_last_pts;
1370             if (!isnan(last_duration) && last_duration > 0 && last_duration < is->max_frame_duration) {
1371                 /* if duration of the last frame was sane, update last_duration in video state */
1372                 is->frame_last_duration = last_duration;
1373             }
1374             if (redisplay)
1375                 delay = 0.0;
1376             else
1377                 delay = compute_target_delay(is->frame_last_duration, is);
1378
1379             time= av_gettime()/1000000.0;
1380             if (time < is->frame_timer + delay && !redisplay) {
1381                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1382                 return;
1383             }
1384
1385             is->frame_timer += delay;
1386             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1387                 is->frame_timer = time;
1388
1389             SDL_LockMutex(is->pictq_mutex);
1390             if (!redisplay && !isnan(vp->pts))
1391                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1392             SDL_UnlockMutex(is->pictq_mutex);
1393
1394             if (is->pictq_size > 1) {
1395                 VideoPicture *nextvp = &is->pictq[(is->pictq_rindex + 1) % VIDEO_PICTURE_QUEUE_SIZE];
1396                 duration = nextvp->pts - vp->pts;
1397                 if(!is->step && (redisplay || framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1398                     if (!redisplay)
1399                         is->frame_drops_late++;
1400                     pictq_next_picture(is);
1401                     redisplay = 0;
1402                     goto retry;
1403                 }
1404             }
1405
1406             if (is->subtitle_st) {
1407                 if (is->subtitle_stream_changed) {
1408                     SDL_LockMutex(is->subpq_mutex);
1409
1410                     while (is->subpq_size) {
1411                         free_subpicture(&is->subpq[is->subpq_rindex]);
1412
1413                         /* update queue size and signal for next picture */
1414                         if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1415                             is->subpq_rindex = 0;
1416
1417                         is->subpq_size--;
1418                     }
1419                     is->subtitle_stream_changed = 0;
1420
1421                     SDL_CondSignal(is->subpq_cond);
1422                     SDL_UnlockMutex(is->subpq_mutex);
1423                 } else {
1424                     if (is->subpq_size > 0) {
1425                         sp = &is->subpq[is->subpq_rindex];
1426
1427                         if (is->subpq_size > 1)
1428                             sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
1429                         else
1430                             sp2 = NULL;
1431
1432                         if ((is->video_current_pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1433                                 || (sp2 && is->video_current_pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1434                         {
1435                             free_subpicture(sp);
1436
1437                             /* update queue size and signal for next picture */
1438                             if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1439                                 is->subpq_rindex = 0;
1440
1441                             SDL_LockMutex(is->subpq_mutex);
1442                             is->subpq_size--;
1443                             SDL_CondSignal(is->subpq_cond);
1444                             SDL_UnlockMutex(is->subpq_mutex);
1445                         }
1446                     }
1447                 }
1448             }
1449
1450 display:
1451             /* display picture */
1452             if (!display_disable && is->show_mode == SHOW_MODE_VIDEO)
1453                 video_display(is);
1454
1455             pictq_next_picture(is);
1456
1457             if (is->step && !is->paused)
1458                 stream_toggle_pause(is);
1459         }
1460     }
1461     is->force_refresh = 0;
1462     if (show_status) {
1463         static int64_t last_time;
1464         int64_t cur_time;
1465         int aqsize, vqsize, sqsize;
1466         double av_diff;
1467
1468         cur_time = av_gettime();
1469         if (!last_time || (cur_time - last_time) >= 30000) {
1470             aqsize = 0;
1471             vqsize = 0;
1472             sqsize = 0;
1473             if (is->audio_st)
1474                 aqsize = is->audioq.size;
1475             if (is->video_st)
1476                 vqsize = is->videoq.size;
1477             if (is->subtitle_st)
1478                 sqsize = is->subtitleq.size;
1479             av_diff = 0;
1480             if (is->audio_st && is->video_st)
1481                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1482             else if (is->video_st)
1483                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1484             else if (is->audio_st)
1485                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1486             av_log(NULL, AV_LOG_INFO,
1487                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1488                    get_master_clock(is),
1489                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1490                    av_diff,
1491                    is->frame_drops_early + is->frame_drops_late,
1492                    aqsize / 1024,
1493                    vqsize / 1024,
1494                    sqsize,
1495                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_dts : 0,
1496                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_pts : 0);
1497             fflush(stdout);
1498             last_time = cur_time;
1499         }
1500     }
1501 }
1502
1503 /* allocate a picture (needs to do that in main thread to avoid
1504    potential locking problems */
1505 static void alloc_picture(VideoState *is)
1506 {
1507     VideoPicture *vp;
1508     int64_t bufferdiff;
1509
1510     vp = &is->pictq[is->pictq_windex];
1511
1512     if (vp->bmp)
1513         SDL_FreeYUVOverlay(vp->bmp);
1514
1515     video_open(is, 0, vp);
1516
1517     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
1518                                    SDL_YV12_OVERLAY,
1519                                    screen);
1520     bufferdiff = vp->bmp ? FFMAX(vp->bmp->pixels[0], vp->bmp->pixels[1]) - FFMIN(vp->bmp->pixels[0], vp->bmp->pixels[1]) : 0;
1521     if (!vp->bmp || vp->bmp->pitches[0] < vp->width || bufferdiff < vp->height * vp->bmp->pitches[0]) {
1522         /* SDL allocates a buffer smaller than requested if the video
1523          * overlay hardware is unable to support the requested size. */
1524         av_log(NULL, AV_LOG_FATAL,
1525                "Error: the video system does not support an image\n"
1526                         "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"
1527                         "to reduce the image size.\n", vp->width, vp->height );
1528         do_exit(is);
1529     }
1530
1531     SDL_LockMutex(is->pictq_mutex);
1532     vp->allocated = 1;
1533     SDL_CondSignal(is->pictq_cond);
1534     SDL_UnlockMutex(is->pictq_mutex);
1535 }
1536
1537 static void duplicate_right_border_pixels(SDL_Overlay *bmp) {
1538     int i, width, height;
1539     Uint8 *p, *maxp;
1540     for (i = 0; i < 3; i++) {
1541         width  = bmp->w;
1542         height = bmp->h;
1543         if (i > 0) {
1544             width  >>= 1;
1545             height >>= 1;
1546         }
1547         if (bmp->pitches[i] > width) {
1548             maxp = bmp->pixels[i] + bmp->pitches[i] * height - 1;
1549             for (p = bmp->pixels[i] + width - 1; p < maxp; p += bmp->pitches[i])
1550                 *(p+1) = *p;
1551         }
1552     }
1553 }
1554
1555 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, int64_t pos, int serial)
1556 {
1557     VideoPicture *vp;
1558
1559 #if defined(DEBUG_SYNC) && 0
1560     printf("frame_type=%c pts=%0.3f\n",
1561            av_get_picture_type_char(src_frame->pict_type), pts);
1562 #endif
1563
1564     /* wait until we have space to put a new picture */
1565     SDL_LockMutex(is->pictq_mutex);
1566
1567     /* keep the last already displayed picture in the queue */
1568     while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE - 1 &&
1569            !is->videoq.abort_request) {
1570         SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1571     }
1572     SDL_UnlockMutex(is->pictq_mutex);
1573
1574     if (is->videoq.abort_request)
1575         return -1;
1576
1577     vp = &is->pictq[is->pictq_windex];
1578
1579     vp->sar = src_frame->sample_aspect_ratio;
1580
1581     /* alloc or resize hardware picture buffer */
1582     if (!vp->bmp || vp->reallocate || !vp->allocated ||
1583         vp->width  != src_frame->width ||
1584         vp->height != src_frame->height) {
1585         SDL_Event event;
1586
1587         vp->allocated  = 0;
1588         vp->reallocate = 0;
1589         vp->width = src_frame->width;
1590         vp->height = src_frame->height;
1591
1592         /* the allocation must be done in the main thread to avoid
1593            locking problems. */
1594         event.type = FF_ALLOC_EVENT;
1595         event.user.data1 = is;
1596         SDL_PushEvent(&event);
1597
1598         /* wait until the picture is allocated */
1599         SDL_LockMutex(is->pictq_mutex);
1600         while (!vp->allocated && !is->videoq.abort_request) {
1601             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1602         }
1603         /* if the queue is aborted, we have to pop the pending ALLOC event or wait for the allocation to complete */
1604         if (is->videoq.abort_request && SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_EVENTMASK(FF_ALLOC_EVENT)) != 1) {
1605             while (!vp->allocated) {
1606                 SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1607             }
1608         }
1609         SDL_UnlockMutex(is->pictq_mutex);
1610
1611         if (is->videoq.abort_request)
1612             return -1;
1613     }
1614
1615     /* if the frame is not skipped, then display it */
1616     if (vp->bmp) {
1617         AVPicture pict = { { 0 } };
1618
1619         /* get a pointer on the bitmap */
1620         SDL_LockYUVOverlay (vp->bmp);
1621
1622         pict.data[0] = vp->bmp->pixels[0];
1623         pict.data[1] = vp->bmp->pixels[2];
1624         pict.data[2] = vp->bmp->pixels[1];
1625
1626         pict.linesize[0] = vp->bmp->pitches[0];
1627         pict.linesize[1] = vp->bmp->pitches[2];
1628         pict.linesize[2] = vp->bmp->pitches[1];
1629
1630 #if CONFIG_AVFILTER
1631         // FIXME use direct rendering
1632         av_picture_copy(&pict, (AVPicture *)src_frame,
1633                         src_frame->format, vp->width, vp->height);
1634 #else
1635         av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1636         is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,
1637             vp->width, vp->height, src_frame->format, vp->width, vp->height,
1638             AV_PIX_FMT_YUV420P, sws_flags, NULL, NULL, NULL);
1639         if (is->img_convert_ctx == NULL) {
1640             av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
1641             exit(1);
1642         }
1643         sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,
1644                   0, vp->height, pict.data, pict.linesize);
1645 #endif
1646         /* workaround SDL PITCH_WORKAROUND */
1647         duplicate_right_border_pixels(vp->bmp);
1648         /* update the bitmap content */
1649         SDL_UnlockYUVOverlay(vp->bmp);
1650
1651         vp->pts = pts;
1652         vp->pos = pos;
1653         vp->serial = serial;
1654
1655         /* now we can update the picture count */
1656         if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
1657             is->pictq_windex = 0;
1658         SDL_LockMutex(is->pictq_mutex);
1659         is->pictq_size++;
1660         SDL_UnlockMutex(is->pictq_mutex);
1661     }
1662     return 0;
1663 }
1664
1665 static int get_video_frame(VideoState *is, AVFrame *frame, AVPacket *pkt, int *serial)
1666 {
1667     int got_picture;
1668
1669     if (packet_queue_get(&is->videoq, pkt, 1, serial) < 0)
1670         return -1;
1671
1672     if (pkt->data == flush_pkt.data) {
1673         avcodec_flush_buffers(is->video_st->codec);
1674
1675         SDL_LockMutex(is->pictq_mutex);
1676         // Make sure there are no long delay timers (ideally we should just flush the queue but that's harder)
1677         while (is->pictq_size && !is->videoq.abort_request) {
1678             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1679         }
1680         is->video_current_pos = -1;
1681         is->frame_last_pts = AV_NOPTS_VALUE;
1682         is->frame_last_duration = 0;
1683         is->frame_timer = (double)av_gettime() / 1000000.0;
1684         is->frame_last_dropped_pts = AV_NOPTS_VALUE;
1685         SDL_UnlockMutex(is->pictq_mutex);
1686         return 0;
1687     }
1688
1689     if(avcodec_decode_video2(is->video_st->codec, frame, &got_picture, pkt) < 0)
1690         return 0;
1691
1692     if (got_picture) {
1693         int ret = 1;
1694         double dpts = NAN;
1695
1696         if (decoder_reorder_pts == -1) {
1697             frame->pts = av_frame_get_best_effort_timestamp(frame);
1698         } else if (decoder_reorder_pts) {
1699             frame->pts = frame->pkt_pts;
1700         } else {
1701             frame->pts = frame->pkt_dts;
1702         }
1703
1704         if (frame->pts != AV_NOPTS_VALUE)
1705             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1706
1707         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1708
1709         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1710             SDL_LockMutex(is->pictq_mutex);
1711             if (is->frame_last_pts != AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE) {
1712                 double clockdiff = get_clock(&is->vidclk) - get_master_clock(is);
1713                 double ptsdiff = dpts - is->frame_last_pts;
1714                 if (!isnan(clockdiff) && fabs(clockdiff) < AV_NOSYNC_THRESHOLD &&
1715                     !isnan(ptsdiff) && ptsdiff > 0 && ptsdiff < AV_NOSYNC_THRESHOLD &&
1716                     clockdiff + ptsdiff - is->frame_last_filter_delay < 0 &&
1717                     is->videoq.nb_packets) {
1718                     is->frame_last_dropped_pos = pkt->pos;
1719                     is->frame_last_dropped_pts = dpts;
1720                     is->frame_last_dropped_serial = *serial;
1721                     is->frame_drops_early++;
1722                     av_frame_unref(frame);
1723                     ret = 0;
1724                 }
1725             }
1726             SDL_UnlockMutex(is->pictq_mutex);
1727         }
1728
1729         return ret;
1730     }
1731     return 0;
1732 }
1733
1734 #if CONFIG_AVFILTER
1735 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1736                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1737 {
1738     int ret;
1739     AVFilterInOut *outputs = NULL, *inputs = NULL;
1740
1741     if (filtergraph) {
1742         outputs = avfilter_inout_alloc();
1743         inputs  = avfilter_inout_alloc();
1744         if (!outputs || !inputs) {
1745             ret = AVERROR(ENOMEM);
1746             goto fail;
1747         }
1748
1749         outputs->name       = av_strdup("in");
1750         outputs->filter_ctx = source_ctx;
1751         outputs->pad_idx    = 0;
1752         outputs->next       = NULL;
1753
1754         inputs->name        = av_strdup("out");
1755         inputs->filter_ctx  = sink_ctx;
1756         inputs->pad_idx     = 0;
1757         inputs->next        = NULL;
1758
1759         if ((ret = avfilter_graph_parse(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1760             goto fail;
1761     } else {
1762         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1763             goto fail;
1764     }
1765
1766     ret = avfilter_graph_config(graph, NULL);
1767 fail:
1768     avfilter_inout_free(&outputs);
1769     avfilter_inout_free(&inputs);
1770     return ret;
1771 }
1772
1773 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1774 {
1775     static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE };
1776     char sws_flags_str[128];
1777     char buffersrc_args[256];
1778     int ret;
1779     AVFilterContext *filt_src = NULL, *filt_out = NULL, *filt_crop;
1780     AVCodecContext *codec = is->video_st->codec;
1781     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1782
1783     av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1784     snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%"PRId64, sws_flags);
1785     graph->scale_sws_opts = av_strdup(sws_flags_str);
1786
1787     snprintf(buffersrc_args, sizeof(buffersrc_args),
1788              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1789              frame->width, frame->height, frame->format,
1790              is->video_st->time_base.num, is->video_st->time_base.den,
1791              codec->sample_aspect_ratio.num, FFMAX(codec->sample_aspect_ratio.den, 1));
1792     if (fr.num && fr.den)
1793         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1794
1795     if ((ret = avfilter_graph_create_filter(&filt_src,
1796                                             avfilter_get_by_name("buffer"),
1797                                             "ffplay_buffer", buffersrc_args, NULL,
1798                                             graph)) < 0)
1799         goto fail;
1800
1801     ret = avfilter_graph_create_filter(&filt_out,
1802                                        avfilter_get_by_name("buffersink"),
1803                                        "ffplay_buffersink", NULL, NULL, graph);
1804     if (ret < 0)
1805         goto fail;
1806
1807     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1808         goto fail;
1809
1810     /* SDL YUV code is not handling odd width/height for some driver
1811      * combinations, therefore we crop the picture to an even width/height. */
1812     if ((ret = avfilter_graph_create_filter(&filt_crop,
1813                                             avfilter_get_by_name("crop"),
1814                                             "ffplay_crop", "floor(in_w/2)*2:floor(in_h/2)*2", NULL, graph)) < 0)
1815         goto fail;
1816     if ((ret = avfilter_link(filt_crop, 0, filt_out, 0)) < 0)
1817         goto fail;
1818
1819     if ((ret = configure_filtergraph(graph, vfilters, filt_src, filt_crop)) < 0)
1820         goto fail;
1821
1822     is->in_video_filter  = filt_src;
1823     is->out_video_filter = filt_out;
1824
1825 fail:
1826     return ret;
1827 }
1828
1829 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1830 {
1831     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1832     int sample_rates[2] = { 0, -1 };
1833     int64_t channel_layouts[2] = { 0, -1 };
1834     int channels[2] = { 0, -1 };
1835     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1836     char asrc_args[256];
1837     int ret;
1838
1839     avfilter_graph_free(&is->agraph);
1840     if (!(is->agraph = avfilter_graph_alloc()))
1841         return AVERROR(ENOMEM);
1842
1843     ret = snprintf(asrc_args, sizeof(asrc_args),
1844                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1845                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1846                    is->audio_filter_src.channels,
1847                    1, is->audio_filter_src.freq);
1848     if (is->audio_filter_src.channel_layout)
1849         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1850                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1851
1852     ret = avfilter_graph_create_filter(&filt_asrc,
1853                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1854                                        asrc_args, NULL, is->agraph);
1855     if (ret < 0)
1856         goto end;
1857
1858
1859     ret = avfilter_graph_create_filter(&filt_asink,
1860                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1861                                        NULL, NULL, is->agraph);
1862     if (ret < 0)
1863         goto end;
1864
1865     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1866         goto end;
1867     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1868         goto end;
1869
1870     if (force_output_format) {
1871         channel_layouts[0] = is->audio_tgt.channel_layout;
1872         channels       [0] = is->audio_tgt.channels;
1873         sample_rates   [0] = is->audio_tgt.freq;
1874         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1875             goto end;
1876         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1877             goto end;
1878         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1879             goto end;
1880         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1881             goto end;
1882     }
1883
1884
1885     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
1886         goto end;
1887
1888     is->in_audio_filter  = filt_asrc;
1889     is->out_audio_filter = filt_asink;
1890
1891 end:
1892     if (ret < 0)
1893         avfilter_graph_free(&is->agraph);
1894     return ret;
1895 }
1896 #endif  /* CONFIG_AVFILTER */
1897
1898 static int video_thread(void *arg)
1899 {
1900     AVPacket pkt = { 0 };
1901     VideoState *is = arg;
1902     AVFrame *frame = av_frame_alloc();
1903     double pts;
1904     int ret;
1905     int serial = 0;
1906
1907 #if CONFIG_AVFILTER
1908     AVFilterGraph *graph = avfilter_graph_alloc();
1909     AVFilterContext *filt_out = NULL, *filt_in = NULL;
1910     int last_w = 0;
1911     int last_h = 0;
1912     enum AVPixelFormat last_format = -2;
1913     int last_serial = -1;
1914 #endif
1915
1916     for (;;) {
1917         while (is->paused && !is->videoq.abort_request)
1918             SDL_Delay(10);
1919
1920         avcodec_get_frame_defaults(frame);
1921         av_free_packet(&pkt);
1922
1923         ret = get_video_frame(is, frame, &pkt, &serial);
1924         if (ret < 0)
1925             goto the_end;
1926         if (!ret)
1927             continue;
1928
1929 #if CONFIG_AVFILTER
1930         if (   last_w != frame->width
1931             || last_h != frame->height
1932             || last_format != frame->format
1933             || last_serial != serial) {
1934             av_log(NULL, AV_LOG_DEBUG,
1935                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
1936                    last_w, last_h,
1937                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
1938                    frame->width, frame->height,
1939                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), serial);
1940             avfilter_graph_free(&graph);
1941             graph = avfilter_graph_alloc();
1942             if ((ret = configure_video_filters(graph, is, vfilters, frame)) < 0) {
1943                 SDL_Event event;
1944                 event.type = FF_QUIT_EVENT;
1945                 event.user.data1 = is;
1946                 SDL_PushEvent(&event);
1947                 av_free_packet(&pkt);
1948                 goto the_end;
1949             }
1950             filt_in  = is->in_video_filter;
1951             filt_out = is->out_video_filter;
1952             last_w = frame->width;
1953             last_h = frame->height;
1954             last_format = frame->format;
1955             last_serial = serial;
1956         }
1957
1958         ret = av_buffersrc_add_frame(filt_in, frame);
1959         if (ret < 0)
1960             goto the_end;
1961         av_frame_unref(frame);
1962         avcodec_get_frame_defaults(frame);
1963         av_free_packet(&pkt);
1964
1965         while (ret >= 0) {
1966             is->frame_last_returned_time = av_gettime() / 1000000.0;
1967
1968             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
1969             if (ret < 0) {
1970                 ret = 0;
1971                 break;
1972             }
1973
1974             is->frame_last_filter_delay = av_gettime() / 1000000.0 - is->frame_last_returned_time;
1975             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
1976                 is->frame_last_filter_delay = 0;
1977
1978             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(filt_out->inputs[0]->time_base);
1979             ret = queue_picture(is, frame, pts, av_frame_get_pkt_pos(frame), serial);
1980             av_frame_unref(frame);
1981         }
1982 #else
1983         pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(is->video_st->time_base);
1984         ret = queue_picture(is, frame, pts, pkt.pos, serial);
1985         av_frame_unref(frame);
1986 #endif
1987
1988         if (ret < 0)
1989             goto the_end;
1990     }
1991  the_end:
1992     avcodec_flush_buffers(is->video_st->codec);
1993 #if CONFIG_AVFILTER
1994     avfilter_graph_free(&graph);
1995 #endif
1996     av_free_packet(&pkt);
1997     av_frame_free(&frame);
1998     return 0;
1999 }
2000
2001 static int subtitle_thread(void *arg)
2002 {
2003     VideoState *is = arg;
2004     SubPicture *sp;
2005     AVPacket pkt1, *pkt = &pkt1;
2006     int got_subtitle;
2007     double pts;
2008     int i, j;
2009     int r, g, b, y, u, v, a;
2010
2011     for (;;) {
2012         while (is->paused && !is->subtitleq.abort_request) {
2013             SDL_Delay(10);
2014         }
2015         if (packet_queue_get(&is->subtitleq, pkt, 1, NULL) < 0)
2016             break;
2017
2018         if (pkt->data == flush_pkt.data) {
2019             avcodec_flush_buffers(is->subtitle_st->codec);
2020             continue;
2021         }
2022         SDL_LockMutex(is->subpq_mutex);
2023         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
2024                !is->subtitleq.abort_request) {
2025             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
2026         }
2027         SDL_UnlockMutex(is->subpq_mutex);
2028
2029         if (is->subtitleq.abort_request)
2030             return 0;
2031
2032         sp = &is->subpq[is->subpq_windex];
2033
2034        /* NOTE: ipts is the PTS of the _first_ picture beginning in
2035            this packet, if any */
2036         pts = 0;
2037         if (pkt->pts != AV_NOPTS_VALUE)
2038             pts = av_q2d(is->subtitle_st->time_base) * pkt->pts;
2039
2040         avcodec_decode_subtitle2(is->subtitle_st->codec, &sp->sub,
2041                                  &got_subtitle, pkt);
2042         if (got_subtitle && sp->sub.format == 0) {
2043             if (sp->sub.pts != AV_NOPTS_VALUE)
2044                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2045             sp->pts = pts;
2046
2047             for (i = 0; i < sp->sub.num_rects; i++)
2048             {
2049                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
2050                 {
2051                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
2052                     y = RGB_TO_Y_CCIR(r, g, b);
2053                     u = RGB_TO_U_CCIR(r, g, b, 0);
2054                     v = RGB_TO_V_CCIR(r, g, b, 0);
2055                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
2056                 }
2057             }
2058
2059             /* now we can update the picture count */
2060             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
2061                 is->subpq_windex = 0;
2062             SDL_LockMutex(is->subpq_mutex);
2063             is->subpq_size++;
2064             SDL_UnlockMutex(is->subpq_mutex);
2065         }
2066         av_free_packet(pkt);
2067     }
2068     return 0;
2069 }
2070
2071 /* copy samples for viewing in editor window */
2072 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2073 {
2074     int size, len;
2075
2076     size = samples_size / sizeof(short);
2077     while (size > 0) {
2078         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2079         if (len > size)
2080             len = size;
2081         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2082         samples += len;
2083         is->sample_array_index += len;
2084         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2085             is->sample_array_index = 0;
2086         size -= len;
2087     }
2088 }
2089
2090 /* return the wanted number of samples to get better sync if sync_type is video
2091  * or external master clock */
2092 static int synchronize_audio(VideoState *is, int nb_samples)
2093 {
2094     int wanted_nb_samples = nb_samples;
2095
2096     /* if not master, then we try to remove or add samples to correct the clock */
2097     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2098         double diff, avg_diff;
2099         int min_nb_samples, max_nb_samples;
2100
2101         diff = get_clock(&is->audclk) - get_master_clock(is);
2102
2103         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2104             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2105             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2106                 /* not enough measures to have a correct estimate */
2107                 is->audio_diff_avg_count++;
2108             } else {
2109                 /* estimate the A-V difference */
2110                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2111
2112                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2113                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2114                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2115                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2116                     wanted_nb_samples = FFMIN(FFMAX(wanted_nb_samples, min_nb_samples), max_nb_samples);
2117                 }
2118                 av_dlog(NULL, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2119                         diff, avg_diff, wanted_nb_samples - nb_samples,
2120                         is->audio_clock, is->audio_diff_threshold);
2121             }
2122         } else {
2123             /* too big difference : may be initial PTS errors, so
2124                reset A-V filter */
2125             is->audio_diff_avg_count = 0;
2126             is->audio_diff_cum       = 0;
2127         }
2128     }
2129
2130     return wanted_nb_samples;
2131 }
2132
2133 /**
2134  * Decode one audio frame and return its uncompressed size.
2135  *
2136  * The processed audio frame is decoded, converted if required, and
2137  * stored in is->audio_buf, with size in bytes given by the return
2138  * value.
2139  */
2140 static int audio_decode_frame(VideoState *is)
2141 {
2142     AVPacket *pkt_temp = &is->audio_pkt_temp;
2143     AVPacket *pkt = &is->audio_pkt;
2144     AVCodecContext *dec = is->audio_st->codec;
2145     int len1, data_size, resampled_data_size;
2146     int64_t dec_channel_layout;
2147     int got_frame;
2148     av_unused double audio_clock0;
2149     int new_packet = 0;
2150     int flush_complete = 0;
2151     int wanted_nb_samples;
2152     AVRational tb;
2153     int ret;
2154     int reconfigure;
2155
2156     for (;;) {
2157         /* NOTE: the audio packet can contain several frames */
2158         while (pkt_temp->size > 0 || (!pkt_temp->data && new_packet) || is->audio_buf_frames_pending) {
2159             if (!is->frame) {
2160                 if (!(is->frame = avcodec_alloc_frame()))
2161                     return AVERROR(ENOMEM);
2162             } else {
2163                 av_frame_unref(is->frame);
2164                 avcodec_get_frame_defaults(is->frame);
2165             }
2166
2167             if (is->audioq.serial != is->audio_pkt_temp_serial)
2168                 break;
2169
2170             if (is->paused)
2171                 return -1;
2172
2173             if (!is->audio_buf_frames_pending) {
2174                 if (flush_complete)
2175                     break;
2176                 new_packet = 0;
2177                 len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
2178                 if (len1 < 0) {
2179                     /* if error, we skip the frame */
2180                     pkt_temp->size = 0;
2181                     break;
2182                 }
2183
2184                 pkt_temp->data += len1;
2185                 pkt_temp->size -= len1;
2186
2187                 if (!got_frame) {
2188                     /* stop sending empty packets if the decoder is finished */
2189                     if (!pkt_temp->data && dec->codec->capabilities & CODEC_CAP_DELAY)
2190                         flush_complete = 1;
2191                     continue;
2192                 }
2193
2194                 tb = (AVRational){1, is->frame->sample_rate};
2195                 if (is->frame->pts != AV_NOPTS_VALUE)
2196                     is->frame->pts = av_rescale_q(is->frame->pts, dec->time_base, tb);
2197                 if (is->frame->pts == AV_NOPTS_VALUE && pkt_temp->pts != AV_NOPTS_VALUE)
2198                     is->frame->pts = av_rescale_q(pkt_temp->pts, is->audio_st->time_base, tb);
2199                 if (pkt_temp->pts != AV_NOPTS_VALUE)
2200                     pkt_temp->pts += (double) is->frame->nb_samples / is->frame->sample_rate / av_q2d(is->audio_st->time_base);
2201
2202 #if CONFIG_AVFILTER
2203                 dec_channel_layout = get_valid_channel_layout(is->frame->channel_layout, av_frame_get_channels(is->frame));
2204
2205                 reconfigure =
2206                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2207                                    is->frame->format, av_frame_get_channels(is->frame))    ||
2208                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2209                     is->audio_filter_src.freq           != is->frame->sample_rate ||
2210                     is->audio_pkt_temp_serial           != is->audio_last_serial;
2211
2212                 if (reconfigure) {
2213                     char buf1[1024], buf2[1024];
2214                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2215                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2216                     av_log(NULL, AV_LOG_DEBUG,
2217                            "Audio frame changed from rate:%d ch:%d fmt:%s layout:%s serial:%d to rate:%d ch:%d fmt:%s layout:%s serial:%d\n",
2218                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, is->audio_last_serial,
2219                            is->frame->sample_rate, av_frame_get_channels(is->frame), av_get_sample_fmt_name(is->frame->format), buf2, is->audio_pkt_temp_serial);
2220
2221                     is->audio_filter_src.fmt            = is->frame->format;
2222                     is->audio_filter_src.channels       = av_frame_get_channels(is->frame);
2223                     is->audio_filter_src.channel_layout = dec_channel_layout;
2224                     is->audio_filter_src.freq           = is->frame->sample_rate;
2225                     is->audio_last_serial               = is->audio_pkt_temp_serial;
2226
2227                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2228                         return ret;
2229                 }
2230
2231                 if ((ret = av_buffersrc_add_frame(is->in_audio_filter, is->frame)) < 0)
2232                     return ret;
2233                 av_frame_unref(is->frame);
2234 #endif
2235             }
2236 #if CONFIG_AVFILTER
2237             if ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, is->frame, 0)) < 0) {
2238                 if (ret == AVERROR(EAGAIN)) {
2239                     is->audio_buf_frames_pending = 0;
2240                     continue;
2241                 }
2242                 return ret;
2243             }
2244             is->audio_buf_frames_pending = 1;
2245             tb = is->out_audio_filter->inputs[0]->time_base;
2246 #endif
2247
2248             data_size = av_samples_get_buffer_size(NULL, av_frame_get_channels(is->frame),
2249                                                    is->frame->nb_samples,
2250                                                    is->frame->format, 1);
2251
2252             dec_channel_layout =
2253                 (is->frame->channel_layout && av_frame_get_channels(is->frame) == av_get_channel_layout_nb_channels(is->frame->channel_layout)) ?
2254                 is->frame->channel_layout : av_get_default_channel_layout(av_frame_get_channels(is->frame));
2255             wanted_nb_samples = synchronize_audio(is, is->frame->nb_samples);
2256
2257             if (is->frame->format        != is->audio_src.fmt            ||
2258                 dec_channel_layout       != is->audio_src.channel_layout ||
2259                 is->frame->sample_rate   != is->audio_src.freq           ||
2260                 (wanted_nb_samples       != is->frame->nb_samples && !is->swr_ctx)) {
2261                 swr_free(&is->swr_ctx);
2262                 is->swr_ctx = swr_alloc_set_opts(NULL,
2263                                                  is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2264                                                  dec_channel_layout,           is->frame->format, is->frame->sample_rate,
2265                                                  0, NULL);
2266                 if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2267                     av_log(NULL, AV_LOG_ERROR,
2268                            "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2269                             is->frame->sample_rate, av_get_sample_fmt_name(is->frame->format), av_frame_get_channels(is->frame),
2270                             is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2271                     break;
2272                 }
2273                 is->audio_src.channel_layout = dec_channel_layout;
2274                 is->audio_src.channels       = av_frame_get_channels(is->frame);
2275                 is->audio_src.freq = is->frame->sample_rate;
2276                 is->audio_src.fmt = is->frame->format;
2277             }
2278
2279             if (is->swr_ctx) {
2280                 const uint8_t **in = (const uint8_t **)is->frame->extended_data;
2281                 uint8_t **out = &is->audio_buf1;
2282                 int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate + 256;
2283                 int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2284                 int len2;
2285                 if (out_size < 0) {
2286                     av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2287                     break;
2288                 }
2289                 if (wanted_nb_samples != is->frame->nb_samples) {
2290                     if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - is->frame->nb_samples) * is->audio_tgt.freq / is->frame->sample_rate,
2291                                                 wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate) < 0) {
2292                         av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2293                         break;
2294                     }
2295                 }
2296                 av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2297                 if (!is->audio_buf1)
2298                     return AVERROR(ENOMEM);
2299                 len2 = swr_convert(is->swr_ctx, out, out_count, in, is->frame->nb_samples);
2300                 if (len2 < 0) {
2301                     av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2302                     break;
2303                 }
2304                 if (len2 == out_count) {
2305                     av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2306                     swr_init(is->swr_ctx);
2307                 }
2308                 is->audio_buf = is->audio_buf1;
2309                 resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2310             } else {
2311                 is->audio_buf = is->frame->data[0];
2312                 resampled_data_size = data_size;
2313             }
2314
2315             audio_clock0 = is->audio_clock;
2316             /* update the audio clock with the pts */
2317             if (is->frame->pts != AV_NOPTS_VALUE) {
2318                 is->audio_clock = is->frame->pts * av_q2d(tb) + (double) is->frame->nb_samples / is->frame->sample_rate;
2319                 is->audio_clock_serial = is->audio_pkt_temp_serial;
2320             }
2321 #ifdef DEBUG
2322             {
2323                 static double last_clock;
2324                 printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2325                        is->audio_clock - last_clock,
2326                        is->audio_clock, audio_clock0);
2327                 last_clock = is->audio_clock;
2328             }
2329 #endif
2330             return resampled_data_size;
2331         }
2332
2333         /* free the current packet */
2334         if (pkt->data)
2335             av_free_packet(pkt);
2336         memset(pkt_temp, 0, sizeof(*pkt_temp));
2337
2338         if (is->audioq.abort_request) {
2339             return -1;
2340         }
2341
2342         if (is->audioq.nb_packets == 0)
2343             SDL_CondSignal(is->continue_read_thread);
2344
2345         /* read next packet */
2346         if ((new_packet = packet_queue_get(&is->audioq, pkt, 1, &is->audio_pkt_temp_serial)) < 0)
2347             return -1;
2348
2349         if (pkt->data == flush_pkt.data) {
2350             avcodec_flush_buffers(dec);
2351             flush_complete = 0;
2352             is->audio_buf_frames_pending = 0;
2353         }
2354
2355         *pkt_temp = *pkt;
2356     }
2357 }
2358
2359 /* prepare a new audio buffer */
2360 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2361 {
2362     VideoState *is = opaque;
2363     int audio_size, len1;
2364     int bytes_per_sec;
2365     int frame_size = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, 1, is->audio_tgt.fmt, 1);
2366
2367     audio_callback_time = av_gettime();
2368
2369     while (len > 0) {
2370         if (is->audio_buf_index >= is->audio_buf_size) {
2371            audio_size = audio_decode_frame(is);
2372            if (audio_size < 0) {
2373                 /* if error, just output silence */
2374                is->audio_buf      = is->silence_buf;
2375                is->audio_buf_size = sizeof(is->silence_buf) / frame_size * frame_size;
2376            } else {
2377                if (is->show_mode != SHOW_MODE_VIDEO)
2378                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2379                is->audio_buf_size = audio_size;
2380            }
2381            is->audio_buf_index = 0;
2382         }
2383         len1 = is->audio_buf_size - is->audio_buf_index;
2384         if (len1 > len)
2385             len1 = len;
2386         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2387         len -= len1;
2388         stream += len1;
2389         is->audio_buf_index += len1;
2390     }
2391     bytes_per_sec = is->audio_tgt.freq * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2392     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2393     /* Let's assume the audio driver that is used by SDL has two periods. */
2394     set_clock_at(&is->audclk, is->audio_clock - (double)(2 * is->audio_hw_buf_size + is->audio_write_buf_size) / bytes_per_sec, is->audio_clock_serial, audio_callback_time / 1000000.0);
2395     sync_clock_to_slave(&is->extclk, &is->audclk);
2396 }
2397
2398 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2399 {
2400     SDL_AudioSpec wanted_spec, spec;
2401     const char *env;
2402     const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2403
2404     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2405     if (env) {
2406         wanted_nb_channels = atoi(env);
2407         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2408     }
2409     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2410         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2411         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2412     }
2413     wanted_spec.channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2414     wanted_spec.freq = wanted_sample_rate;
2415     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2416         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2417         return -1;
2418     }
2419     wanted_spec.format = AUDIO_S16SYS;
2420     wanted_spec.silence = 0;
2421     wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2422     wanted_spec.callback = sdl_audio_callback;
2423     wanted_spec.userdata = opaque;
2424     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2425         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels): %s\n", wanted_spec.channels, SDL_GetError());
2426         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2427         if (!wanted_spec.channels) {
2428             av_log(NULL, AV_LOG_ERROR,
2429                    "No more channel combinations to try, audio open failed\n");
2430             return -1;
2431         }
2432         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2433     }
2434     if (spec.format != AUDIO_S16SYS) {
2435         av_log(NULL, AV_LOG_ERROR,
2436                "SDL advised audio format %d is not supported!\n", spec.format);
2437         return -1;
2438     }
2439     if (spec.channels != wanted_spec.channels) {
2440         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2441         if (!wanted_channel_layout) {
2442             av_log(NULL, AV_LOG_ERROR,
2443                    "SDL advised channel count %d is not supported!\n", spec.channels);
2444             return -1;
2445         }
2446     }
2447
2448     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2449     audio_hw_params->freq = spec.freq;
2450     audio_hw_params->channel_layout = wanted_channel_layout;
2451     audio_hw_params->channels =  spec.channels;
2452     return spec.size;
2453 }
2454
2455 /* open a given stream. Return 0 if OK */
2456 static int stream_component_open(VideoState *is, int stream_index)
2457 {
2458     AVFormatContext *ic = is->ic;
2459     AVCodecContext *avctx;
2460     AVCodec *codec;
2461     const char *forced_codec_name = NULL;
2462     AVDictionary *opts;
2463     AVDictionaryEntry *t = NULL;
2464     int sample_rate, nb_channels;
2465     int64_t channel_layout;
2466     int ret;
2467
2468     if (stream_index < 0 || stream_index >= ic->nb_streams)
2469         return -1;
2470     avctx = ic->streams[stream_index]->codec;
2471
2472     codec = avcodec_find_decoder(avctx->codec_id);
2473
2474     switch(avctx->codec_type){
2475         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2476         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2477         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2478     }
2479     if (forced_codec_name)
2480         codec = avcodec_find_decoder_by_name(forced_codec_name);
2481     if (!codec) {
2482         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2483                                       "No codec could be found with name '%s'\n", forced_codec_name);
2484         else                   av_log(NULL, AV_LOG_WARNING,
2485                                       "No codec could be found with id %d\n", avctx->codec_id);
2486         return -1;
2487     }
2488
2489     avctx->codec_id = codec->id;
2490     avctx->workaround_bugs   = workaround_bugs;
2491     avctx->lowres            = lowres;
2492     if(avctx->lowres > codec->max_lowres){
2493         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2494                 codec->max_lowres);
2495         avctx->lowres= codec->max_lowres;
2496     }
2497     avctx->idct_algo         = idct;
2498     avctx->error_concealment = error_concealment;
2499
2500     if(avctx->lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2501     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
2502     if(codec->capabilities & CODEC_CAP_DR1)
2503         avctx->flags |= CODEC_FLAG_EMU_EDGE;
2504
2505     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2506     if (!av_dict_get(opts, "threads", NULL, 0))
2507         av_dict_set(&opts, "threads", "auto", 0);
2508     if (avctx->lowres)
2509         av_dict_set(&opts, "lowres", av_asprintf("%d", avctx->lowres), AV_DICT_DONT_STRDUP_VAL);
2510     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2511         av_dict_set(&opts, "refcounted_frames", "1", 0);
2512     if (avcodec_open2(avctx, codec, &opts) < 0)
2513         return -1;
2514     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2515         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2516         return AVERROR_OPTION_NOT_FOUND;
2517     }
2518
2519     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2520     switch (avctx->codec_type) {
2521     case AVMEDIA_TYPE_AUDIO:
2522 #if CONFIG_AVFILTER
2523         {
2524             AVFilterLink *link;
2525
2526             is->audio_filter_src.freq           = avctx->sample_rate;
2527             is->audio_filter_src.channels       = avctx->channels;
2528             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2529             is->audio_filter_src.fmt            = avctx->sample_fmt;
2530             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2531                 return ret;
2532             link = is->out_audio_filter->inputs[0];
2533             sample_rate    = link->sample_rate;
2534             nb_channels    = link->channels;
2535             channel_layout = link->channel_layout;
2536         }
2537 #else
2538         sample_rate    = avctx->sample_rate;
2539         nb_channels    = avctx->channels;
2540         channel_layout = avctx->channel_layout;
2541 #endif
2542
2543         /* prepare audio output */
2544         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2545             return ret;
2546         is->audio_hw_buf_size = ret;
2547         is->audio_src = is->audio_tgt;
2548         is->audio_buf_size  = 0;
2549         is->audio_buf_index = 0;
2550
2551         /* init averaging filter */
2552         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2553         is->audio_diff_avg_count = 0;
2554         /* since we do not have a precise anough audio fifo fullness,
2555            we correct audio sync only if larger than this threshold */
2556         is->audio_diff_threshold = 2.0 * is->audio_hw_buf_size / av_samples_get_buffer_size(NULL, is->audio_tgt.channels, is->audio_tgt.freq, is->audio_tgt.fmt, 1);
2557
2558         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2559         memset(&is->audio_pkt_temp, 0, sizeof(is->audio_pkt_temp));
2560
2561         is->audio_stream = stream_index;
2562         is->audio_st = ic->streams[stream_index];
2563
2564         packet_queue_start(&is->audioq);
2565         SDL_PauseAudio(0);
2566         break;
2567     case AVMEDIA_TYPE_VIDEO:
2568         is->video_stream = stream_index;
2569         is->video_st = ic->streams[stream_index];
2570
2571         packet_queue_start(&is->videoq);
2572         is->video_tid = SDL_CreateThread(video_thread, is);
2573         is->queue_attachments_req = 1;
2574         break;
2575     case AVMEDIA_TYPE_SUBTITLE:
2576         is->subtitle_stream = stream_index;
2577         is->subtitle_st = ic->streams[stream_index];
2578         packet_queue_start(&is->subtitleq);
2579
2580         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2581         break;
2582     default:
2583         break;
2584     }
2585     return 0;
2586 }
2587
2588 static void stream_component_close(VideoState *is, int stream_index)
2589 {
2590     AVFormatContext *ic = is->ic;
2591     AVCodecContext *avctx;
2592
2593     if (stream_index < 0 || stream_index >= ic->nb_streams)
2594         return;
2595     avctx = ic->streams[stream_index]->codec;
2596
2597     switch (avctx->codec_type) {
2598     case AVMEDIA_TYPE_AUDIO:
2599         packet_queue_abort(&is->audioq);
2600
2601         SDL_CloseAudio();
2602
2603         packet_queue_flush(&is->audioq);
2604         av_free_packet(&is->audio_pkt);
2605         swr_free(&is->swr_ctx);
2606         av_freep(&is->audio_buf1);
2607         is->audio_buf1_size = 0;
2608         is->audio_buf = NULL;
2609         av_frame_free(&is->frame);
2610
2611         if (is->rdft) {
2612             av_rdft_end(is->rdft);
2613             av_freep(&is->rdft_data);
2614             is->rdft = NULL;
2615             is->rdft_bits = 0;
2616         }
2617 #if CONFIG_AVFILTER
2618         avfilter_graph_free(&is->agraph);
2619 #endif
2620         break;
2621     case AVMEDIA_TYPE_VIDEO:
2622         packet_queue_abort(&is->videoq);
2623
2624         /* note: we also signal this mutex to make sure we deblock the
2625            video thread in all cases */
2626         SDL_LockMutex(is->pictq_mutex);
2627         SDL_CondSignal(is->pictq_cond);
2628         SDL_UnlockMutex(is->pictq_mutex);
2629
2630         SDL_WaitThread(is->video_tid, NULL);
2631
2632         packet_queue_flush(&is->videoq);
2633         break;
2634     case AVMEDIA_TYPE_SUBTITLE:
2635         packet_queue_abort(&is->subtitleq);
2636
2637         /* note: we also signal this mutex to make sure we deblock the
2638            video thread in all cases */
2639         SDL_LockMutex(is->subpq_mutex);
2640         is->subtitle_stream_changed = 1;
2641
2642         SDL_CondSignal(is->subpq_cond);
2643         SDL_UnlockMutex(is->subpq_mutex);
2644
2645         SDL_WaitThread(is->subtitle_tid, NULL);
2646
2647         packet_queue_flush(&is->subtitleq);
2648         break;
2649     default:
2650         break;
2651     }
2652
2653     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2654     avcodec_close(avctx);
2655     switch (avctx->codec_type) {
2656     case AVMEDIA_TYPE_AUDIO:
2657         is->audio_st = NULL;
2658         is->audio_stream = -1;
2659         break;
2660     case AVMEDIA_TYPE_VIDEO:
2661         is->video_st = NULL;
2662         is->video_stream = -1;
2663         break;
2664     case AVMEDIA_TYPE_SUBTITLE:
2665         is->subtitle_st = NULL;
2666         is->subtitle_stream = -1;
2667         break;
2668     default:
2669         break;
2670     }
2671 }
2672
2673 static int decode_interrupt_cb(void *ctx)
2674 {
2675     VideoState *is = ctx;
2676     return is->abort_request;
2677 }
2678
2679 static int is_realtime(AVFormatContext *s)
2680 {
2681     if(   !strcmp(s->iformat->name, "rtp")
2682        || !strcmp(s->iformat->name, "rtsp")
2683        || !strcmp(s->iformat->name, "sdp")
2684     )
2685         return 1;
2686
2687     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2688                  || !strncmp(s->filename, "udp:", 4)
2689                 )
2690     )
2691         return 1;
2692     return 0;
2693 }
2694
2695 /* this thread gets the stream from the disk or the network */
2696 static int read_thread(void *arg)
2697 {
2698     VideoState *is = arg;
2699     AVFormatContext *ic = NULL;
2700     int err, i, ret;
2701     int st_index[AVMEDIA_TYPE_NB];
2702     AVPacket pkt1, *pkt = &pkt1;
2703     int eof = 0;
2704     int pkt_in_play_range = 0;
2705     AVDictionaryEntry *t;
2706     AVDictionary **opts;
2707     int orig_nb_streams;
2708     SDL_mutex *wait_mutex = SDL_CreateMutex();
2709
2710     memset(st_index, -1, sizeof(st_index));
2711     is->last_video_stream = is->video_stream = -1;
2712     is->last_audio_stream = is->audio_stream = -1;
2713     is->last_subtitle_stream = is->subtitle_stream = -1;
2714
2715     ic = avformat_alloc_context();
2716     ic->interrupt_callback.callback = decode_interrupt_cb;
2717     ic->interrupt_callback.opaque = is;
2718     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2719     if (err < 0) {
2720         print_error(is->filename, err);
2721         ret = -1;
2722         goto fail;
2723     }
2724     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2725         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2726         ret = AVERROR_OPTION_NOT_FOUND;
2727         goto fail;
2728     }
2729     is->ic = ic;
2730
2731     if (genpts)
2732         ic->flags |= AVFMT_FLAG_GENPTS;
2733
2734     opts = setup_find_stream_info_opts(ic, codec_opts);
2735     orig_nb_streams = ic->nb_streams;
2736
2737     err = avformat_find_stream_info(ic, opts);
2738     if (err < 0) {
2739         av_log(NULL, AV_LOG_WARNING,
2740                "%s: could not find codec parameters\n", is->filename);
2741         ret = -1;
2742         goto fail;
2743     }
2744     for (i = 0; i < orig_nb_streams; i++)
2745         av_dict_free(&opts[i]);
2746     av_freep(&opts);
2747
2748     if (ic->pb)
2749         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use url_feof() to test for the end
2750
2751     if (seek_by_bytes < 0)
2752         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2753
2754     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2755
2756     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2757         window_title = av_asprintf("%s - %s", t->value, input_filename);
2758
2759     /* if seeking requested, we execute it */
2760     if (start_time != AV_NOPTS_VALUE) {
2761         int64_t timestamp;
2762
2763         timestamp = start_time;
2764         /* add the stream start time */
2765         if (ic->start_time != AV_NOPTS_VALUE)
2766             timestamp += ic->start_time;
2767         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2768         if (ret < 0) {
2769             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2770                     is->filename, (double)timestamp / AV_TIME_BASE);
2771         }
2772     }
2773
2774     is->realtime = is_realtime(ic);
2775
2776     for (i = 0; i < ic->nb_streams; i++)
2777         ic->streams[i]->discard = AVDISCARD_ALL;
2778     if (!video_disable)
2779         st_index[AVMEDIA_TYPE_VIDEO] =
2780             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2781                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2782     if (!audio_disable)
2783         st_index[AVMEDIA_TYPE_AUDIO] =
2784             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2785                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2786                                 st_index[AVMEDIA_TYPE_VIDEO],
2787                                 NULL, 0);
2788     if (!video_disable && !subtitle_disable)
2789         st_index[AVMEDIA_TYPE_SUBTITLE] =
2790             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2791                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2792                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2793                                  st_index[AVMEDIA_TYPE_AUDIO] :
2794                                  st_index[AVMEDIA_TYPE_VIDEO]),
2795                                 NULL, 0);
2796     if (show_status) {
2797         av_dump_format(ic, 0, is->filename, 0);
2798     }
2799
2800     is->show_mode = show_mode;
2801
2802     /* open the streams */
2803     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2804         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2805     }
2806
2807     ret = -1;
2808     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2809         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2810     }
2811     if (is->show_mode == SHOW_MODE_NONE)
2812         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2813
2814     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2815         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2816     }
2817
2818     if (is->video_stream < 0 && is->audio_stream < 0) {
2819         av_log(NULL, AV_LOG_FATAL, "%s: could not open codecs\n", is->filename);
2820         ret = -1;
2821         goto fail;
2822     }
2823
2824     if (infinite_buffer < 0 && is->realtime)
2825         infinite_buffer = 1;
2826
2827     for (;;) {
2828         if (is->abort_request)
2829             break;
2830         if (is->paused != is->last_paused) {
2831             is->last_paused = is->paused;
2832             if (is->paused)
2833                 is->read_pause_return = av_read_pause(ic);
2834             else
2835                 av_read_play(ic);
2836         }
2837 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2838         if (is->paused &&
2839                 (!strcmp(ic->iformat->name, "rtsp") ||
2840                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2841             /* wait 10 ms to avoid trying to get another packet */
2842             /* XXX: horrible */
2843             SDL_Delay(10);
2844             continue;
2845         }
2846 #endif
2847         if (is->seek_req) {
2848             int64_t seek_target = is->seek_pos;
2849             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2850             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2851 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2852 //      of the seek_pos/seek_rel variables
2853
2854             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2855             if (ret < 0) {
2856                 av_log(NULL, AV_LOG_ERROR,
2857                        "%s: error while seeking\n", is->ic->filename);
2858             } else {
2859                 if (is->audio_stream >= 0) {
2860                     packet_queue_flush(&is->audioq);
2861                     packet_queue_put(&is->audioq, &flush_pkt);
2862                 }
2863                 if (is->subtitle_stream >= 0) {
2864                     packet_queue_flush(&is->subtitleq);
2865                     packet_queue_put(&is->subtitleq, &flush_pkt);
2866                 }
2867                 if (is->video_stream >= 0) {
2868                     packet_queue_flush(&is->videoq);
2869                     packet_queue_put(&is->videoq, &flush_pkt);
2870                 }
2871                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2872                    set_clock(&is->extclk, NAN, 0);
2873                 } else {
2874                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2875                 }
2876             }
2877             is->seek_req = 0;
2878             is->queue_attachments_req = 1;
2879             eof = 0;
2880             if (is->paused)
2881                 step_to_next_frame(is);
2882         }
2883         if (is->queue_attachments_req) {
2884             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2885                 AVPacket copy;
2886                 if ((ret = av_copy_packet(&copy, &is->video_st->attached_pic)) < 0)
2887                     goto fail;
2888                 packet_queue_put(&is->videoq, &copy);
2889             }
2890             is->queue_attachments_req = 0;
2891         }
2892
2893         /* if the queue are full, no need to read more */
2894         if (infinite_buffer<1 &&
2895               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2896             || (   (is->audioq   .nb_packets > MIN_FRAMES || is->audio_stream < 0 || is->audioq.abort_request)
2897                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0 || is->videoq.abort_request
2898                     || (is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC))
2899                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0 || is->subtitleq.abort_request)))) {
2900             /* wait 10 ms */
2901             SDL_LockMutex(wait_mutex);
2902             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2903             SDL_UnlockMutex(wait_mutex);
2904             continue;
2905         }
2906         if (eof) {
2907             if (is->video_stream >= 0) {
2908                 av_init_packet(pkt);
2909                 pkt->data = NULL;
2910                 pkt->size = 0;
2911                 pkt->stream_index = is->video_stream;
2912                 packet_queue_put(&is->videoq, pkt);
2913             }
2914             if (is->audio_stream >= 0 &&
2915                 is->audio_st->codec->codec->capabilities & CODEC_CAP_DELAY) {
2916                 av_init_packet(pkt);
2917                 pkt->data = NULL;
2918                 pkt->size = 0;
2919                 pkt->stream_index = is->audio_stream;
2920                 packet_queue_put(&is->audioq, pkt);
2921             }
2922             SDL_Delay(10);
2923             if (is->audioq.size + is->videoq.size + is->subtitleq.size == 0) {
2924                 if (loop != 1 && (!loop || --loop)) {
2925                     stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2926                 } else if (autoexit) {
2927                     ret = AVERROR_EOF;
2928                     goto fail;
2929                 }
2930             }
2931             eof=0;
2932             continue;
2933         }
2934         ret = av_read_frame(ic, pkt);
2935         if (ret < 0) {
2936             if (ret == AVERROR_EOF || url_feof(ic->pb))
2937                 eof = 1;
2938             if (ic->pb && ic->pb->error)
2939                 break;
2940             SDL_LockMutex(wait_mutex);
2941             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2942             SDL_UnlockMutex(wait_mutex);
2943             continue;
2944         }
2945         /* check if packet is in play range specified by user, then queue, otherwise discard */
2946         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2947                 (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
2948                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2949                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
2950                 <= ((double)duration / 1000000);
2951         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2952             packet_queue_put(&is->audioq, pkt);
2953         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
2954                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
2955             packet_queue_put(&is->videoq, pkt);
2956         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2957             packet_queue_put(&is->subtitleq, pkt);
2958         } else {
2959             av_free_packet(pkt);
2960         }
2961     }
2962     /* wait until the end */
2963     while (!is->abort_request) {
2964         SDL_Delay(100);
2965     }
2966
2967     ret = 0;
2968  fail:
2969     /* close each stream */
2970     if (is->audio_stream >= 0)
2971         stream_component_close(is, is->audio_stream);
2972     if (is->video_stream >= 0)
2973         stream_component_close(is, is->video_stream);
2974     if (is->subtitle_stream >= 0)
2975         stream_component_close(is, is->subtitle_stream);
2976     if (is->ic) {
2977         avformat_close_input(&is->ic);
2978     }
2979
2980     if (ret != 0) {
2981         SDL_Event event;
2982
2983         event.type = FF_QUIT_EVENT;
2984         event.user.data1 = is;
2985         SDL_PushEvent(&event);
2986     }
2987     SDL_DestroyMutex(wait_mutex);
2988     return 0;
2989 }
2990
2991 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2992 {
2993     VideoState *is;
2994
2995     is = av_mallocz(sizeof(VideoState));
2996     if (!is)
2997         return NULL;
2998     av_strlcpy(is->filename, filename, sizeof(is->filename));
2999     is->iformat = iformat;
3000     is->ytop    = 0;
3001     is->xleft   = 0;
3002
3003     /* start video display */
3004     is->pictq_mutex = SDL_CreateMutex();
3005     is->pictq_cond  = SDL_CreateCond();
3006
3007     is->subpq_mutex = SDL_CreateMutex();
3008     is->subpq_cond  = SDL_CreateCond();
3009
3010     packet_queue_init(&is->videoq);
3011     packet_queue_init(&is->audioq);
3012     packet_queue_init(&is->subtitleq);
3013
3014     is->continue_read_thread = SDL_CreateCond();
3015
3016     init_clock(&is->vidclk, &is->videoq.serial);
3017     init_clock(&is->audclk, &is->audioq.serial);
3018     init_clock(&is->extclk, &is->extclk.serial);
3019     is->audio_clock_serial = -1;
3020     is->audio_last_serial = -1;
3021     is->av_sync_type = av_sync_type;
3022     is->read_tid     = SDL_CreateThread(read_thread, is);
3023     if (!is->read_tid) {
3024         av_free(is);
3025         return NULL;
3026     }
3027     return is;
3028 }
3029
3030 static void stream_cycle_channel(VideoState *is, int codec_type)
3031 {
3032     AVFormatContext *ic = is->ic;
3033     int start_index, stream_index;
3034     int old_index;
3035     AVStream *st;
3036
3037     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3038         start_index = is->last_video_stream;
3039         old_index = is->video_stream;
3040     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3041         start_index = is->last_audio_stream;
3042         old_index = is->audio_stream;
3043     } else {
3044         start_index = is->last_subtitle_stream;
3045         old_index = is->subtitle_stream;
3046     }
3047     stream_index = start_index;
3048     for (;;) {
3049         if (++stream_index >= is->ic->nb_streams)
3050         {
3051             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3052             {
3053                 stream_index = -1;
3054                 is->last_subtitle_stream = -1;
3055                 goto the_end;
3056             }
3057             if (start_index == -1)
3058                 return;
3059             stream_index = 0;
3060         }
3061         if (stream_index == start_index)
3062             return;
3063         st = ic->streams[stream_index];
3064         if (st->codec->codec_type == codec_type) {
3065             /* check that parameters are OK */
3066             switch (codec_type) {
3067             case AVMEDIA_TYPE_AUDIO:
3068                 if (st->codec->sample_rate != 0 &&
3069                     st->codec->channels != 0)
3070                     goto the_end;
3071                 break;
3072             case AVMEDIA_TYPE_VIDEO:
3073             case AVMEDIA_TYPE_SUBTITLE:
3074                 goto the_end;
3075             default:
3076                 break;
3077             }
3078         }
3079     }
3080  the_end:
3081     stream_component_close(is, old_index);
3082     stream_component_open(is, stream_index);
3083 }
3084
3085
3086 static void toggle_full_screen(VideoState *is)
3087 {
3088 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
3089     /* OS X needs to reallocate the SDL overlays */
3090     int i;
3091     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
3092         is->pictq[i].reallocate = 1;
3093 #endif
3094     is_full_screen = !is_full_screen;
3095     video_open(is, 1, NULL);
3096 }
3097
3098 static void toggle_audio_display(VideoState *is)
3099 {
3100     int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
3101     int next = is->show_mode;
3102     do {
3103         next = (next + 1) % SHOW_MODE_NB;
3104     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3105     if (is->show_mode != next) {
3106         fill_rectangle(screen,
3107                     is->xleft, is->ytop, is->width, is->height,
3108                     bgcolor, 1);
3109         is->force_refresh = 1;
3110         is->show_mode = next;
3111     }
3112 }
3113
3114 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3115     double remaining_time = 0.0;
3116     SDL_PumpEvents();
3117     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
3118         if (!cursor_hidden && av_gettime() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3119             SDL_ShowCursor(0);
3120             cursor_hidden = 1;
3121         }
3122         if (remaining_time > 0.0)
3123             av_usleep((int64_t)(remaining_time * 1000000.0));
3124         remaining_time = REFRESH_RATE;
3125         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3126             video_refresh(is, &remaining_time);
3127         SDL_PumpEvents();
3128     }
3129 }
3130
3131 /* handle an event sent by the GUI */
3132 static void event_loop(VideoState *cur_stream)
3133 {
3134     SDL_Event event;
3135     double incr, pos, frac;
3136
3137     for (;;) {
3138         double x;
3139         refresh_loop_wait_event(cur_stream, &event);
3140         switch (event.type) {
3141         case SDL_KEYDOWN:
3142             if (exit_on_keydown) {
3143                 do_exit(cur_stream);
3144                 break;
3145             }
3146             switch (event.key.keysym.sym) {
3147             case SDLK_ESCAPE:
3148             case SDLK_q:
3149                 do_exit(cur_stream);
3150                 break;
3151             case SDLK_f:
3152                 toggle_full_screen(cur_stream);
3153                 cur_stream->force_refresh = 1;
3154                 break;
3155             case SDLK_p:
3156             case SDLK_SPACE:
3157                 toggle_pause(cur_stream);
3158                 break;
3159             case SDLK_s: // S: Step to next frame
3160                 step_to_next_frame(cur_stream);
3161                 break;
3162             case SDLK_a:
3163                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3164                 break;
3165             case SDLK_v:
3166                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3167                 break;
3168             case SDLK_t:
3169                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3170                 break;
3171             case SDLK_w:
3172                 toggle_audio_display(cur_stream);
3173                 break;
3174             case SDLK_PAGEUP:
3175                 incr = 600.0;
3176                 goto do_seek;
3177             case SDLK_PAGEDOWN:
3178                 incr = -600.0;
3179                 goto do_seek;
3180             case SDLK_LEFT:
3181                 incr = -10.0;
3182                 goto do_seek;
3183             case SDLK_RIGHT:
3184                 incr = 10.0;
3185                 goto do_seek;
3186             case SDLK_UP:
3187                 incr = 60.0;
3188                 goto do_seek;
3189             case SDLK_DOWN:
3190                 incr = -60.0;
3191             do_seek:
3192                     if (seek_by_bytes) {
3193                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
3194                             pos = cur_stream->video_current_pos;
3195                         } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
3196                             pos = cur_stream->audio_pkt.pos;
3197                         } else
3198                             pos = avio_tell(cur_stream->ic->pb);
3199                         if (cur_stream->ic->bit_rate)
3200                             incr *= cur_stream->ic->bit_rate / 8.0;
3201                         else
3202                             incr *= 180000.0;
3203                         pos += incr;
3204                         stream_seek(cur_stream, pos, incr, 1);
3205                     } else {
3206                         pos = get_master_clock(cur_stream);
3207                         if (isnan(pos))
3208                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3209                         pos += incr;
3210                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3211                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3212                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3213                     }
3214                 break;
3215             default:
3216                 break;
3217             }
3218             break;
3219         case SDL_VIDEOEXPOSE:
3220             cur_stream->force_refresh = 1;
3221             break;
3222         case SDL_MOUSEBUTTONDOWN:
3223             if (exit_on_mousedown) {
3224                 do_exit(cur_stream);
3225                 break;
3226             }
3227         case SDL_MOUSEMOTION:
3228             if (cursor_hidden) {
3229                 SDL_ShowCursor(1);
3230                 cursor_hidden = 0;
3231             }
3232             cursor_last_shown = av_gettime();
3233             if (event.type == SDL_MOUSEBUTTONDOWN) {
3234                 x = event.button.x;
3235             } else {
3236                 if (event.motion.state != SDL_PRESSED)
3237                     break;
3238                 x = event.motion.x;
3239             }
3240                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3241                     uint64_t size =  avio_size(cur_stream->ic->pb);
3242                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3243                 } else {
3244                     int64_t ts;
3245                     int ns, hh, mm, ss;
3246                     int tns, thh, tmm, tss;
3247                     tns  = cur_stream->ic->duration / 1000000LL;
3248                     thh  = tns / 3600;
3249                     tmm  = (tns % 3600) / 60;
3250                     tss  = (tns % 60);
3251                     frac = x / cur_stream->width;
3252                     ns   = frac * tns;
3253                     hh   = ns / 3600;
3254                     mm   = (ns % 3600) / 60;
3255                     ss   = (ns % 60);
3256                     av_log(NULL, AV_LOG_INFO,
3257                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3258                             hh, mm, ss, thh, tmm, tss);
3259                     ts = frac * cur_stream->ic->duration;
3260                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3261                         ts += cur_stream->ic->start_time;
3262                     stream_seek(cur_stream, ts, 0, 0);
3263                 }
3264             break;
3265         case SDL_VIDEORESIZE:
3266                 screen = SDL_SetVideoMode(FFMIN(16383, event.resize.w), event.resize.h, 0,
3267                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
3268                 if (!screen) {
3269                     av_log(NULL, AV_LOG_FATAL, "Failed to set video mode\n");
3270                     do_exit(cur_stream);
3271                 }
3272                 screen_width  = cur_stream->width  = screen->w;
3273                 screen_height = cur_stream->height = screen->h;
3274                 cur_stream->force_refresh = 1;
3275             break;
3276         case SDL_QUIT:
3277         case FF_QUIT_EVENT:
3278             do_exit(cur_stream);
3279             break;
3280         case FF_ALLOC_EVENT:
3281             alloc_picture(event.user.data1);
3282             break;
3283         default:
3284             break;
3285         }
3286     }
3287 }
3288
3289 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3290 {
3291     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3292     return opt_default(NULL, "video_size", arg);
3293 }
3294
3295 static int opt_width(void *optctx, const char *opt, const char *arg)
3296 {
3297     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3298     return 0;
3299 }
3300
3301 static int opt_height(void *optctx, const char *opt, const char *arg)
3302 {
3303     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3304     return 0;
3305 }
3306
3307 static int opt_format(void *optctx, const char *opt, const char *arg)
3308 {
3309     file_iformat = av_find_input_format(arg);
3310     if (!file_iformat) {
3311         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3312         return AVERROR(EINVAL);
3313     }
3314     return 0;
3315 }
3316
3317 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3318 {
3319     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3320     return opt_default(NULL, "pixel_format", arg);
3321 }
3322
3323 static int opt_sync(void *optctx, const char *opt, const char *arg)
3324 {
3325     if (!strcmp(arg, "audio"))
3326         av_sync_type = AV_SYNC_AUDIO_MASTER;
3327     else if (!strcmp(arg, "video"))
3328         av_sync_type = AV_SYNC_VIDEO_MASTER;
3329     else if (!strcmp(arg, "ext"))
3330         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3331     else {
3332         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3333         exit(1);
3334     }
3335     return 0;
3336 }
3337
3338 static int opt_seek(void *optctx, const char *opt, const char *arg)
3339 {
3340     start_time = parse_time_or_die(opt, arg, 1);
3341     return 0;
3342 }
3343
3344 static int opt_duration(void *optctx, const char *opt, const char *arg)
3345 {
3346     duration = parse_time_or_die(opt, arg, 1);
3347     return 0;
3348 }
3349
3350 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3351 {
3352     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3353                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3354                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3355                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3356     return 0;
3357 }
3358
3359 static void opt_input_file(void *optctx, const char *filename)
3360 {
3361     if (input_filename) {
3362         av_log(NULL, AV_LOG_FATAL,
3363                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3364                 filename, input_filename);
3365         exit(1);
3366     }
3367     if (!strcmp(filename, "-"))
3368         filename = "pipe:";
3369     input_filename = filename;
3370 }
3371
3372 static int opt_codec(void *optctx, const char *opt, const char *arg)
3373 {
3374    const char *spec = strchr(opt, ':');
3375    if (!spec) {
3376        av_log(NULL, AV_LOG_ERROR,
3377               "No media specifier was specified in '%s' in option '%s'\n",
3378                arg, opt);
3379        return AVERROR(EINVAL);
3380    }
3381    spec++;
3382    switch (spec[0]) {
3383    case 'a' :    audio_codec_name = arg; break;
3384    case 's' : subtitle_codec_name = arg; break;
3385    case 'v' :    video_codec_name = arg; break;
3386    default:
3387        av_log(NULL, AV_LOG_ERROR,
3388               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3389        return AVERROR(EINVAL);
3390    }
3391    return 0;
3392 }
3393
3394 static int dummy;
3395
3396 static const OptionDef options[] = {
3397 #include "cmdutils_common_opts.h"
3398     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3399     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3400     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3401     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3402     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3403     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3404     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3405     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
3406     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
3407     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
3408     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3409     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3410     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3411     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3412     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3413     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3414     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3415     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
3416     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3417     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3418     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3419     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3420     { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { &idct }, "set idct algo",  "algo" },
3421     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
3422     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3423     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3424     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3425     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3426     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3427     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3428     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3429     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3430 #if CONFIG_AVFILTER
3431     { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "set video filters", "filter_graph" },
3432     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3433 #endif
3434     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3435     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3436     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3437     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3438     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3439     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3440     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3441     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3442     { NULL, },
3443 };
3444
3445 static void show_usage(void)
3446 {
3447     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3448     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3449     av_log(NULL, AV_LOG_INFO, "\n");
3450 }
3451
3452 void show_help_default(const char *opt, const char *arg)
3453 {
3454     av_log_set_callback(log_callback_help);
3455     show_usage();
3456     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3457     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3458     printf("\n");
3459     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3460     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3461 #if !CONFIG_AVFILTER
3462     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3463 #else
3464     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3465 #endif
3466     printf("\nWhile playing:\n"
3467            "q, ESC              quit\n"
3468            "f                   toggle full screen\n"
3469            "p, SPC              pause\n"
3470            "a                   cycle audio channel\n"
3471            "v                   cycle video channel\n"
3472            "t                   cycle subtitle channel\n"
3473            "w                   show audio waves\n"
3474            "s                   activate frame-step mode\n"
3475            "left/right          seek backward/forward 10 seconds\n"
3476            "down/up             seek backward/forward 1 minute\n"
3477            "page down/page up   seek backward/forward 10 minutes\n"
3478            "mouse click         seek to percentage in file corresponding to fraction of width\n"
3479            );
3480 }
3481
3482 static int lockmgr(void **mtx, enum AVLockOp op)
3483 {
3484    switch(op) {
3485       case AV_LOCK_CREATE:
3486           *mtx = SDL_CreateMutex();
3487           if(!*mtx)
3488               return 1;
3489           return 0;
3490       case AV_LOCK_OBTAIN:
3491           return !!SDL_LockMutex(*mtx);
3492       case AV_LOCK_RELEASE:
3493           return !!SDL_UnlockMutex(*mtx);
3494       case AV_LOCK_DESTROY:
3495           SDL_DestroyMutex(*mtx);
3496           return 0;
3497    }
3498    return 1;
3499 }
3500
3501 /* Called from the main */
3502 int main(int argc, char **argv)
3503 {
3504     int flags;
3505     VideoState *is;
3506     char dummy_videodriver[] = "SDL_VIDEODRIVER=dummy";
3507
3508     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3509     parse_loglevel(argc, argv, options);
3510
3511     /* register all codecs, demux and protocols */
3512     avcodec_register_all();
3513 #if CONFIG_AVDEVICE
3514     avdevice_register_all();
3515 #endif
3516 #if CONFIG_AVFILTER
3517     avfilter_register_all();
3518 #endif
3519     av_register_all();
3520     avformat_network_init();
3521
3522     init_opts();
3523
3524     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3525     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3526
3527     show_banner(argc, argv, options);
3528
3529     parse_options(NULL, argc, argv, options, opt_input_file);
3530
3531     if (!input_filename) {
3532         show_usage();
3533         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3534         av_log(NULL, AV_LOG_FATAL,
3535                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3536         exit(1);
3537     }
3538
3539     if (display_disable) {
3540         video_disable = 1;
3541     }
3542     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3543     if (audio_disable)
3544         flags &= ~SDL_INIT_AUDIO;
3545     if (display_disable)
3546         SDL_putenv(dummy_videodriver); /* For the event queue, we always need a video driver. */
3547 #if !defined(__MINGW32__) && !defined(__APPLE__)
3548     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
3549 #endif
3550     if (SDL_Init (flags)) {
3551         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3552         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3553         exit(1);
3554     }
3555
3556     if (!display_disable) {
3557         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3558         fs_screen_width = vi->current_w;
3559         fs_screen_height = vi->current_h;
3560     }
3561
3562     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3563     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3564     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3565
3566     if (av_lockmgr_register(lockmgr)) {
3567         av_log(NULL, AV_LOG_FATAL, "Could not initialize lock manager!\n");
3568         do_exit(NULL);
3569     }
3570
3571     av_init_packet(&flush_pkt);
3572     flush_pkt.data = (uint8_t *)&flush_pkt;
3573
3574     is = stream_open(input_filename, file_iformat);
3575     if (!is) {
3576         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3577         do_exit(NULL);
3578     }
3579
3580     event_loop(is);
3581
3582     /* never returns */
3583
3584     return 0;
3585 }